bark是什么意思_bark怎么读_bark的用法_翻译_短语搭配_权威例句
2024-10-21 11:45:38 学考宝 作者:佚名
基本释义:
bark
英 [bɑːk]美 [bɑːrk]
- v. 大声嚷,吼叫;(狗)吠,叫;擦破(胫部的)皮;剥去(树,木头的)皮
- n. 狗叫声,吠声;吼叫声;树皮;小帆船,三桅帆船
- 【名】 (Bark)(英、西、德、捷、法、芬、瑞典)巴克,(阿拉伯、俄)巴尔克(人名)
复数 barks 第三人称单数 barks 现在分词 barking 过去式 barked 过去分词 barked
词典扩展 短语搭配 权威例句 实用例句
柯林斯词典
bark /bɑːk/ CET4 TEM4 [ barking barked barks ]
- 1.
不及物动词 When a dog barks, it makes a short, loud noise, once or several times. (狗) 吠例:
Don't let the dogs bark.
别让狗叫。
- 2.
可数名词 Bark is also a noun. 吠声例:
The Doberman let out a string of roaring barks.
那条杜宾犬发出一连串的吼叫声。
- 3.
不及物动词 If you bark at someone, you shout at them aggressively in a loud, rough voice. 咆哮例:
I didn't mean to bark at you.
我不是有意吼你。
- 4.
不可数名词 Bark is the tough material that covers the outside of a tree. 树皮
- 5.
动词 to scrape or rub off skin, as in an injury 擦伤; 刮伤
同根词
词根:bark
同近义词
-
vt.吠叫;咆哮;咳嗽
-
vi.厉声说出;高声叫卖
-
n.吠声;任何似犬狐叫的声音
同义词辨析
bark bay growl howl snarl yap 【导航词义:吠,叫】
bark v. 吠,叫;发出轰响
〔辨析〕 主要指狗、狐、松鼠等吠、叫;除此之外,还可以指人发出短促清脆的轰响。例1: The black dog barked at a stranger.
那条黑狗对着一个陌生人叫。
例2: The girls barked with laughter.
女孩子们哄然大笑。
bay v. 发出长嗥,连续吠叫
〔辨析〕 指狗或狼连续不断地叫,声音低沉,尤指在追捕猎物时狂叫。例1: Dogs bayed at the moon.
狗对着月亮狂吠。
例2: The hounds were baying as they followed the escaped prisoner.
警犬一边叫一边追逃犯。
growl v. 狂吠;低吼
〔辨析〕 指狗高声吠叫,作此义解时常可与 bark 换用;也可指狗等动物低声吼叫。例1: The dog growled/barked at the stranger.
狗朝着那个陌生人狂吠。
例2: Her dog growled at me.
她的狗冲我低声吼叫。
howl v. 嗥叫,狂吠
〔辨析〕 指狗或狼长时间地高声叫。例1: The dogs howled all night.
那些狗整夜狂吠。
snarl v. 咆哮
〔辨析〕 指狗等动物发怒时从牙齿间低声发出吼叫,常可与 growl 换用。例1: The dog snarled/growled at me.
这条狗对着我龇牙咧嘴地狂叫。
例2: The dog never snarled/growled unless it was mistreated.
除非受到了虐待,这只狗从不发怒。
yap v. 狂吠,急叫
〔辨析〕 指小狗兴奋地吠叫。例1: The dog yapped at him.
那只狗向他汪汪乱叫。
词组短语
1. cinnamon bark 肉桂皮
2. bark up the wrong tree 精力用在不该用的地方 ; 错怪人 ; 目标错误 ; 找错门了
3. Cassia Bark 肉桂 ; 桂皮 ; 肉桂粉末 ; 山扁豆皮
4. Bark-peeler 剥皮机
5. bark beetle 树皮甲虫
6. pine bark 松树皮
7. cassia bark 肉桂;桂皮
8. eucommia bark 杜仲;杜仲粉末
9. Ash Bark 秦皮 ; 秦皮粉末
10. tree bark 树皮绉
11. Darwin's Bark Spider 达尔文树皮蛛 ; 达尔文吠蛛 ; 达尔文树皮蜘蛛
12. Tree Peony Bark 牡丹皮 ; 牡丹皮粉末 ; 牡丹皮提取物
13. bark pocket 林 夹皮 ; 树皮斑快 ; 皮囊 ; 树皮斑块
14. Cinchona Bark 金鸡纳皮 ; 金鸡纳胜 ; 金鸡纳树皮
15. bark at 狗朝着(对着)某人叫;对…狗吠
权威例句
1. I could hear a dog barking.
我听到犬吠声。《牛津高阶英汉双解词典》
2. The young trees were used as supports for lodgings, with the waterproof bark used as roofing.
年轻的树木被用作住所的支柱,防水的树皮被用作屋顶。
3. Dogs bark before they bite.
恶行之前有恶声.《期刊摘选》
4. Then there was a woman's voice, rising shrilly above the barking.
接着,一个女人的尖厉声音盖过了犬吠声。《柯林斯高阶英汉双解学习词典》
5. The bark of the muntjac was believed to waken the sun.
人们相信山羌的吠叫声可以唤醒太阳.《期刊摘选》
6. The growing birch tree exfoliated excess bark.
这正成长的桦树剥落了过剩的树皮.《期刊摘选》
7. I set the log on the ground and shaved off the bark.
我把原木放在地上,然后刨掉树皮。《柯林斯英汉双解大词典》
8. In the year 105, he made it from tree bark, bamboo, cloth rags, and fishing nets.
在公元105年,他用树皮、竹子、破布和渔网制成了它。
9. Their dogs bark loudly.
他们的狗大声吠叫。
10. 'Ha!' It was a cross between a laugh and a bark
“哈!”那声音听起来既像在笑又像在叫。《柯林斯高阶英汉双解学习词典》
11. The most important use of the bark, by far, was the canoe.
树皮最重要的用途是用作独木舟。
12. He slashed the bark off the tree with his knife.
他用刀把树皮从树上砍下.《简明英汉词典》
13. Healthy trees are also better able to fend off bark beetle.
健康的树木也能更好地抵御树皮甲虫。
14. She barked out an order.
她厉声宣布命令。《牛津词典》
15. They peel off bark, splitting me several, Be using numerous to knock me and night.
他们剥下树皮, 将我劈成数段, 在用无数个日夜的敲打我.《期刊摘选》
16. Cocks crow and dogs bark.
鸡叫狗咬.《现代汉英综合大词典》
17. Pitch bleeds freely from break in the bark.
树脂从树皮的裂口自然地流出来.《简明英汉词典》
18. ‘ Woof! Woof! ’ he barked.
“汪!汪!”它叫着。《牛津高阶英汉双解词典》
19. So the winter bark was used for larger utensils and containers.
所以冬天的树皮被用来制作更大的用具和容器。
20. Deer had stripped all the bark off the tree.
鹿把树皮全都啃光了。《牛津词典》
21. A tree needs bark.
树需要皮。
22. Across vast areas of western North America, increasingly mild winters are causing massive outbreaks of bark beetle.
在北美西部的广大地区,日益温暖的冬季正导致树皮甲虫的大规模爆发。
23. a bark of laughter
一声大笑《牛津词典》
24. Those trees have very beautiful white bark.
那些树长着非常漂亮的白色树皮.《期刊摘选》
25. This tree is always recognizable by its extremely beautiful silvery bark.
这种树很容易辨认,因为它有着非常漂亮的银色树皮。《柯林斯高阶英汉双解学习词典》
26. They are tall and white, the bark, I mean.
它们又高又白,我是说树皮。
27. This process produced paper from cloth, straw, wood or the bark of trees.
这个过程生产了从布, 稻草, 木头,和树皮做成的纸.《期刊摘选》
28. Now besides the bark, Native Americans also used the wood of the birch tree.
现在除了树皮,印第安人还使用桦树的木材。
29. He tried to bark in reply, but a wave sla ed the sound back at him.
他想吠叫回答, 但一阵波涛把他的声音打了回来.《期刊摘选》
30. Bark may be used as raw material for paper-making.
树皮可以做造纸的原料。《新英汉大辞典》
31. Recoiling in pain, I'd scrape my back or arms on the scaly tree bark.
我疼得直往后缩,后背或胳膊被粗糙的树皮刮伤。
32. Birch bark is pliable and very easy to bend.
桦树皮很柔韧,很容易弯曲。
33. Dogs, for example, are alleged to whine or bark nervously just before earthquakes strike.
例如, 据说狗在地震即将发生时,发出哀鸣或紧张不安地吠叫.《辞典例句》
34. North American hickory having loose gray shaggy bark and edible nuts.
北美山胡桃树,有蓬松的灰色的表面粗糙的树皮和可食用的果儿.《期刊摘选》
35. A policeman held his gun in both hands and barked an order.
警察双手握枪,厉声发出指令。《柯林斯高阶英语词典》
36. That's one of the great things about birch bark.
那就是桦树皮的好处之一。
37. He'd scratched his name in the bark of the tree.
他把名字刻在树皮上了.《期刊摘选》
38. Mother took hold of the barking dogs by their collars.
母亲拉住了那几只吠叫的狗的项圈。《柯林斯高阶英汉双解学习词典》
39. Not only did the dog bark at him, but ( it ) bit him.
这只狗不但对他吠叫, 而且咬了他.《期刊摘选》
40. The birch tree has white bark, and this tough protective outer layer of the tree, this white bark, is waterproof.
桦树有白色的树皮,树上这个坚硬的保护外层,这个白色的树皮,是防水的。
41. He saw noble and beautiful visions, but he could only whine and bark at Ruth.
他看到了高雅美丽的幻影, 却只有对着露丝呜咽吠叫.《期刊摘选》
42. Dogs always know who's bad and will naturally bark at them.
狗永远知道谁是坏人,而且一定会对他们吠叫.《期刊摘选》
43. Debarking: Stripping bark from logs prior ro their being pulped.
去皮: 制浆前,把树区性剥去树皮上的操作.《期刊摘选》
44. She dipped her head and uttered a short bark.
她点了点头,发出一声短促的吠叫声.《期刊摘选》
45. They could fold the bark into many shapes.
他们可以把树皮折成许多形状。
46. He could subsist on bark and grass roots in the isolated island.
在荒岛上他只能靠树皮和草根维持生命.《期刊摘选》
47. Scientists in Switzerland realised that most other researchers had been barking up the wrong tree.
瑞士科学家意识到其他研究者大多研究方向不对头。《柯林斯高阶英汉双解学习词典》
48. European birch with silvery white peeling bark and markedly drooping branches.
欧洲的一种桦树,有银白色脱落树皮和下垂的枝条.《期刊摘选》
49. He made paper with bark, ropes, rags and so on.
他用树皮、绳子、破布等造纸。
50. The birch has smooth bark and slender branches.
桦树有光滑的树皮和细长的树枝。《外研社英语同义词辨析词典》
51. Outside, a dog was barking
外面,一只狗在叫。《柯林斯高阶英汉双解学习词典》
52. Paths of bark chippings will help to give the impression of a woodland walkway.
铺满碎树皮的小路有助于制造林间小道的印象。《柯林斯高阶英汉双解学习词典》
53. I just put the bark back in my pocket and kept mum.
我把树皮放回口袋里,没有说出来。
54. "We also built bog bridges, " Macie says. "You need to take the supportive logs underneath and remove their bark because the bark can rot quickly."
“我们还建了沼泽桥,”马西埃 (Macie) 说,“你需要将一些支撑的原木放在下面,去掉上面的树皮,因为它们腐烂的很快。”
55. She lived in a shed roofed over with strips of bark.
她住在以一片一片狭长的树皮为顶的小屋里.《期刊摘选》
56. The dog growled/ barked at the stranger.
狗朝着那个陌生人狂吠。《外研社英语同义词辨析词典》
57. The black dog barked at a stranger.
那条黑狗对着一个陌生人叫。《外研社英语同义词辨析词典》
58. If a dog barks at you, will you bark back?
如果一条狗对你狂吠, 难道你还吠回去?《期刊摘选》
59. I know people make utensils out of wood, but utensils out of tree bark?
我知道人们用木头做餐具,但是用树皮做餐具?
60. Don't let the dogs bark...
让那些狗别叫。《柯林斯高阶英语词典》
61. It takes the bark of three whole trees to make enough of the drug to treat a single patient
单是治疗一个病人,就需要三棵树的全部树皮来制取这种药。《柯林斯高阶英汉双解学习词典》
62. Our dog, Rex, used to sit outside our front gate and bark.
我们的狗雷克斯过去常蹲在大门外吠叫.《用法词典》
63. He barked questions at her.
他厉声质问她。《牛津词典》
64. The dog suddenly started barking at us.
那条狗突然开始对我们汪汪叫。《牛津词典》
65. All are not thieves that dog bark at.
狗对着吠叫的人,并非都是小偷.《期刊摘选》
66. A cur barking at the sun cannot detract from its glory.
狂犬吠日,无损于太阳的光辉。《汉英大词典》
67. When he jumped, his feet did not hold on to the bark.
当它跳的时候, 他的脚爪抓不住树皮.《期刊摘选》
68. An Indian plant with a long fiber in its bark that is suitable for papermaking.
中义一种印度的植物,在树皮中有很久的纤维适合造纸.《期刊摘选》
69. Beavers peel off the bark to eat and they also use the branches for building their shelters.
海狸把树皮剥下来吃,它们也用树枝来筑巢。
70. A significant correlation existed between disease severity and bark relative water content.
枝条树皮相对含水量与病害程度显著相关.《期刊摘选》
71. They bark or attack people who try to enter the property.
它们会对尝试进入垃圾场的人吠叫或者袭击.《期刊摘选》
72. You're barking up the wrong tree if you're expecting us to lend you any money.
你要是指望我们借钱给你,你是走错庙门了。《牛津词典》
73. Botany's focus on the bark of Broussonetia papyrifera.
从植物学的观点来看,树皮衣的材料是构树的树皮的部份.《期刊摘选》
74. Its layers of bark can fall off naturally.
它的树皮会一层层自然脱落.《期刊摘选》
75. Mr. Smith may bark up the wrong tree if he thinks he can fool her.
如果史密斯先生认为可以愚弄她的话,那他就认错人了.《期刊摘选》
76. He could hear a dog barking.
他听得到狗叫。《牛津高阶英汉双解词典》
77. He raced ahead up into the bush, barking and snarling
它嗥叫着冲向前,一头钻进了灌木丛。《柯林斯高阶英汉双解学习词典》
78. They only just touch the bark, they don't cut the trees.
他们仅仅触及树皮, 他们不是砍树.《期刊摘选》
79. While your bark grows thick and hardens.
当你的树皮变得又厚又硬.《期刊摘选》
80. He bared the tree of its bark.
他剥光树皮.《简明英汉词典》
81. Deer had stripped the tree of its bark.
鹿啃掉了树皮。《牛津词典》
82. The dog was called off when It'started to bark at the stranger.
那条狗刚向陌生人吠叫时,就被唤开了.《期刊摘选》
83. It is not the sap within the furrowed bark, nor aa claw.
她不是蕴涵在皱褶树皮下的汁液, 也不是利爪下垂死的小鸟.《期刊摘选》
84. She can be a bit tetchy but her bark is worse than her bite.
她脾气可能有点暴躁,但她是刀子嘴,豆腐心。《柯林斯高阶英语词典》
85. The bark feels coarse.
这树皮摸上去粗糙.《期刊摘选》
86. The builder looked at me as though I was barking mad.
那个建筑工人瞅着我,好像我哪不对劲儿似的。《柯林斯高阶英汉双解学习词典》
87. The texture and patterning of the bark is often characteristic of the species.
树皮的图案以及纹理具有物种特异性.《期刊摘选》
88. It is necessary to chip off the bark of the tree.
有必要把这树皮扒下来.《期刊摘选》
89. The leaves, bark and sap are also common ingredients of local herbal remedies.
树叶、树皮和树液也是当地草药疗法的常用药材。《柯林斯英汉双解大词典》
90. Don't let the dogs bark
让那些狗别叫。《柯林斯高阶英汉双解学习词典》
91. The girls barked with laughter.
女孩子们哄然大笑。《外研社英语同义词辨析词典》
92. He could hear her dog barking and whining in the background
他能听见她的狗在暗处吠叫、哀嚎。《柯林斯高阶英汉双解学习词典》
93. The dog have a sudden bark.
那狗突然发出吠叫声.《期刊摘选》
94. The medicinal qualities of their conkers , leaves and bark soothe varicose veins.
七叶树的果实 、 叶子和树皮的药效能减缓静脉曲张.《期刊摘选》
95. One bark dog set all the street a bark.
一犬吠形,百犬吠声.《期刊摘选》
96. Over the years, bark slowly covered the rusting chain.
岁月悠悠, 榆树皮慢慢裹住了那条生锈的铁链.《期刊摘选》
97. I set the log on the ground and shaved off the bark
我将原木放到了地上,刨掉了树皮。《柯林斯高阶英汉双解学习词典》
98. The corridor echoed with the barking of a dozen dogs.
十来只狗的叫声在走廊里回响。《柯林斯高阶英汉双解学习词典》
99. Sometimes on lonely mountain meres, I find a magic bark.
偶而在孤寂荒凉的山间小湖, 我觅得一只神奇的小帆船.《辞典例句》
100. He grasped the hatchet quickly to peel off the bark and shape the wood.
他迅速抓起斧头,要把树皮削掉,并且修饰木头的形状。
101. I conditioned the dog to bark at strangers.
我训练这只狗对陌生人吠叫.《期刊摘选》
102. They will soil your house, destroy your belongings, bark excessively, fight other dogs and even bite you.
它们会弄脏你的房子、毁坏你的财物、狂吠、打架,甚至咬你。
103. They would peel large sheets of bark from the tree to form lightweight yet sturdy canoes.
他们会从树上剥下大片的树皮,做成轻便而结实的独木舟。
104. A small dog barked at a seagull he was chasing.
小狗对着它正在追赶的一只海鸥吠叫。《柯林斯高阶英语词典》
105. These have an area where bark has been cut away.
就是把树的一块区域的树皮去掉.《期刊摘选》
106. Bark may be used as raw material for paper-making.
树皮可以做造纸的原料。《汉英大词典》
107. I didn't mean to bark at you.
我不是有意吼你。《柯林斯英汉双解大词典》
108. The bark of some trees can be used as medicine.
有些树皮可以作药材.《现代英汉综合大词典》
109. The bark was stretched over frames made from tree branches, stitched together and sealed with resin.
树皮被铺在由树枝制成的框架上,然后将它们缝合在一起,最后用树脂密封。
110. The females use their ovipositors to bore into the bark.
雌蜂用其产卵器钻入树皮.《期刊摘选》
111. I didn't mean to bark at you...
我不是成心对你嚷嚷的。《柯林斯高阶英语词典》
112. Look for a product containing Phloretin, a strong new antioxidant derived from bark extract.
查找含有根皮素的产品, 一种强大的新的抗氧化剂(来自树皮提取物).《期刊摘选》
实用例句
1. They bark in front of radio and television microphones, where they actually trumpet their innumeracy.
FORBES: American Math Chuckleheads
2. Adam LaRoche and Ian Desmond homered for the Nationals on Bark in the Park day at Citi Field.
WSJ: Mets stay close, beaten late by Harper, Nationals
3. But they still bark and jump up happily as people pass by.
VOA : special.2009.12.11
4. When I visited Africa I observed how elephants stripped trees of bark as well as of foliage.
FORBES: When You Ban The Sale Of Ivory, You Ban Elephants
5. As with every float, each square centimeter of space must be covered with flowers or other organic material, including moss,seeds, bark and plant fiber.
VOA : standard.2009.12.30
6. In the western part of the US, pine bark beetles have thrived, partly because of changing temperatures.
BBC: Why are the world's older trees disappearing?
7. Indeed, it is OK, under the new law, to bark if your owner is about to be attacked.
WSJ: Hawaii Turns to Dog Shrink as 'Incessant Barkers' Cut Plea Deals
8. They bark or attack people who try to enter the property.
VOA : special.2010.05.30
9. In fact, the explanation for the drop in gasoline prices is more like the dog that didn't bark.
NPR: Curb Your Conspiracy Theories on Gas Prices
10. Grey squirrels have been tearing bark from the trees.
北美灰松鼠一直在剥树皮。
11. Western governments are betting that the Kremlin's bark will be worse than its bite.
ECONOMIST: Getting ready for war
12. The leaf is separated from the bark by an articulation.
这片叶子因一个关节与树皮分开。
13. Wrigley had claimed that magnolia bark extract, an ingredient in the gum and mints, contributed to the germ-killing capabilities.
FORBES: Wrigley Settles False-Ad Class Action For $6M
14. It's like trying to separate a bark from the dog and selling the bark separately.
WSJ: Banks Look to Replace Lost Debit-Card Fees
15. This week we go back to one of my favourite Sherlock Holmes stories, The dog that didn't bark.
BBC: Sniffing out an ECB rate cut
16. The Greek doctor Hippocrates advised his patients to chew on the bark and leaves of the willow.
VOA : special.2009.10.20
17. As with the mountain bark beetle, it is not entirely clear why this is happening.
ECONOMIST: Getting warmer
18. Each year their seven qvevris are scraped clean by hand with a tool made of folded cherry bark.
BBC: Discovering wine in Georgia
19. In younger ash there is a distinctive smooth silver grey bark and sooty black buds.
BBC: The heartbreak of watching the slow death of ash trees
20. The bark was used to tan leather.
这种树皮鞣料用于制革。
21. These include sassafras,vanilla, wintergreen, cherry-tree bark, licorice root, black cherry and cane sugar.
VOA : special.2011.08.01
22. The Doberman let out a bark.
这只杜宾犬叫了一声。
23. So all in all it is hardly a surprise that the dog didn't bark.
BBC: Sniffing out an ECB rate cut
24. You can use mulch made from bark, pine needles,cottonseed or oak leaves.
VOA : special.2010.06.15
25. He wakes up only one more time in the night, with a single bark that trails into silence.
NEWYORKER: A Box of Puppies
26. We say his bark is worse than his bite.
VOA : special.2010.05.30
27. Wrigley began marketing its Eclipse gum with the magnolia bark extract in June 2008.
FORBES: Wrigley Settles False-Ad Class Action For $6M
28. At primary school I remember learning how to identify trees by their leaves or bark.
BBC: The heartbreak of watching the slow death of ash trees
29. We stay at the Kakadu Culture Camp, in tents beneath the woolly bark trees.
BBC: Australias Top End
30. Occasionally it would pounce on a piece of bark that had fallen off the firewood, or a shadow.
NEWYORKER: The Woman of the House
31. Using a hollow tube, they drill into the tree and extract a 5-mm wide cylinder that shows each ring starting with the most recent, just under the bark.
VOA : standard.2010.04.05
32. Because it didn't bark he know that the intruder was known by the dog.
BBC: Sniffing out an ECB rate cut
33. Girls with cheeks smeared with thanaka (sun block made from ground tree bark) balance two to a bicycle.
BBC: A new dawn in Burma
34. This process produced paper from cloth, straw, wood or the bark of trees.
VOA : special.2009.01.26
35. It tested this pine bark-derived molecule to see if it blocked the thrombin receptor and found that it did.
FORBES: Magazine Article
36. "CBS is clearly wedded to that format, obviously because they have had success with it, " Bark said.
CNN: Multi-camera sitcoms dominate in ratings
37. I'm not sure I picked up the bark, or the caramel, coffee or fruit bruised or unblemished for that matter.
WSJ: Luxuriously Liquored
38. Afterward, the newlyweds carve their marriage vows into the bark of a tree.
NPR: Love And Lunacy: Vivaldi's 'Orlando Furioso'
39. FDA have botanical origins, such as aspirin from willow bark and tamoxifen from the Pacific yew tree.
ECONOMIST: Herbal remedies
40. This Pacific island needed a stronger bark-abeyance law, authorities here say, because it has a particular pooch-population problem.
WSJ: Hawaii Turns to Dog Shrink as 'Incessant Barkers' Cut Plea Deals
41. Small pieces of tree bark or cut up leaves can be used.
VOA : special.2009.06.30
42. Psychiatrists began acting like Sherlock Holmes, looking for various "dogs that didn't bark" to explain their patients' problems.
WSJ: DSM-5: A Manual Run Amok
43. This process produced paper from cloth, straw,wood or the bark of trees.
VOA : special.2009.07.06
44. Dogs began to bark, aware of our approach.
狗察觉到我们的靠近,叫了起来。
45. For instance, in the autumn, leaves stay on the trees and the bark falls off.
BBC: The perfect trip: New South Wales
46. But Bark said there are parallels, at least in terms of coverage, with the Kennedy assassination.
CNN: Jackson spectacle likely a world event
47. That is to say, Polemarchus recalling Polemarchus, those who are good to friends and bark and growl at strangers.
也就是说,回想一下,那些对朋友很好,且会向陌生人叫嚣及咆哮之属。政治哲学导论课程节选 : 耶鲁公开课