高中生、艺考生、留学生的好帮手-学考宝
莫等闲,白了少年头,空悲切 因学习而成长,因学习而成熟

rooster是什么意思_rooster的音标_用法_翻译_短语搭配_权威例句

基本释义:

rooster

英 [ˈruːstə(r)]play美 [ˈruːstər]play

  • n. <美>公鸡,雄鸡

复数 roosters

词典扩展 短语搭配 权威例句 实用例句

柯林斯词典

rooster /ˈruːstə/

  • 1.
    可数名词 A rooster is an adult male chicken. 公鸡

同近义词

词组短语

1. The Proud Rooster 骄傲的公鸡

2. Locate Rooster Fight 查找狂妄的打斗

3. Golden Rooster Awards 金鸡奖

4. The Rooster and the Fox 公鸡和狐狸

5. Rooster Cogburn 狂人考伯恩 ; 公鸡考格本 ; 莽龙怒凤 ; 柯格伯恩

6. Red Rooster 红公鸡 ; 红公鸡餐厅 ; 瑞德路斯特 ; 出版者

7. gallic rooster 高卢雄鸡

8. I Like My Rooster 我喜欢我的公鸡 ; 我喜爱我的公鸡

9. Big Rooster 大公鸡 ; 比路特 ; 比卢特 ; 另有法国金鸡

权威例句

1. Do they have a rooster?

他们家有养公鸡吗?

2. The crow of the rooster woke me up.

雄鸡的啼叫声把我吵醒了.《辞典例句》

3. Well, a rooster's bigger. Longer feathers.

公鸡更大羽毛更长

4. The rooster spotted a raft and took the other two animals with it.

公鸡发现了一个木筏,用木筏载另外两个动物.《期刊摘选》

5. Rooster : I don"t want to risk my neck just to fly.

鸡: 我可不想为了飞而伤着自己。

6. He gets up at the crow of the rooster every day.

他每天鸡鸣即起.《期刊摘选》

7. If you were born lucky, even your rooster will lay eggs.

人幸运的时候公鸡都会生蛋.《期刊摘选》

8. Rooster died in here, I'm happy to add.

我很乐于告诉你,他后来死在这里。

9. Rooster: Well, you have a long face.

公鸡:你有一张长长的脸!

10. No Rooster. It's spring now. Everyone should start to work.

蜜蜂:不行,公鸡, 春天到了, 每个人都应该开始工作了.《期刊摘选》

11. We heard the crow of a rooster.

我们听到了公鸡的啼叫声。

12. Rooster: Let me go! Let me go!

公鸡:放开我!放开我!

13. It was the first time Rooster had ever seen a real dead guy.

罗斯特还是第一次见到死人。《provided by jukuu》

14. State Bird: rooster, symbol of courage and tenacity.

国鸟: 公鸡, 象征勇敢和顽强.《期刊摘选》

15. I was born in the year of the Rooster.

我是鸡年出生的。

16. Rooster: Yes, to good health.

鸡:对,为了健康。

17. Why does a rooster always look neat?

为什麽公鸡看起来总是整整齐齐的?《期刊摘选》

18. The rooster's crow woke me.

雄鸡的啼叫声把我吵醒了。

19. A rooster was leading many hens.

一只公鸡正带着许多母鸡。

20. Another of the dishes that day consisted of rooster blood.

那天还有道菜是用鸡血做的。

21. A few hens and then rooster, intended to serve God's mysterious ends , struggle through to maturity.

有几只母鸡,偶尔也有一只公鸡竟能迎合上帝神秘的意愿历经磨难活下来.《期刊摘选》

22. The rooster crows at dawn.

公鸡在黎明时打鸣儿。

23. Once he brought home a rooster which he said he found in the woods.

有一次他带回来一只公鸡,说是在林子里捉到的。《provided by jukuu》

24. Rooster testes contain small amounts of androgen.

公鸡睾丸中含有少量的雄激素.《期刊摘选》

25. Venier caliper, metallic ruler, measuring tape, square, center punch, felt point marker pen.

卡钳, 金属的直尺, 卷尺, 曲尺, 中心冲, 感觉测点作记号钢笔.《期刊摘选》

26. Rooster, we are not so pretty as you are, but we can do much work.

马:公鸡, 虽然我们没有你漂亮, 但是我们能做许多工作.《期刊摘选》

27. Secret government work appears to be a good deal for Pennsylvania's roosters.

政府的秘密工作对于宾夕法尼亚州的公鸡们来说似乎是个利好消息.《期刊摘选》

28. To rooster students' subjective spirits on the encouragement of writing practice;

鼓励写作实践,培养学生主体性精神;

29. She gets up to prepare breakfast as soon as she hears the rooster crow.

鸡一打鸣儿,她就起床准备早饭了.《期刊摘选》

30. Can you hear the crow of the rooster?

你能听到公鸡叫吗?

31. The Chicken Determination the Changes of Rooster Sperm Quality Induced by Chronic Fluorosis

慢性氟中毒鸡精子质量测定研究

32. Rooster, you can sing very well.

青蛙:公鸡, 你的嗓子很好.《期刊摘选》

33. Rooster: Let's drink to that!

鸡:让我们为这个喝一杯!

34. The rooster did not say anything.

公鸡什么也没有说.《期刊摘选》

35. Rooster: Hey, are you free Friday?

公鸡:嗨,星期五有空吗?

36. It's obviously a lie to that you've watched a rooster lie there laying eggs.

你说见过一只公鸡躺在那儿下蛋,这显然是在扯谎.《期刊摘选》

37. The rooster bristled his crest.

公鸡竖起了鸡冠.《现代英汉综合大词典》

38. The rooster makes more racket than the hen that lays the egg.

公鸡的啼叫声胜于会生蛋的母鸡.《期刊摘选》

39. If someone is always going to be blocking the rooster.

如果有人总是要来搞破坏的话。《provided by jukuu》

40. Rooster: Robert, good to meet you!

公鸡:罗伯特,很高兴见到你!

41. The late moon arose before the first rooster crowed.

公鸡未啼,下弦月已经挂在天边.《辞典例句》

42. The rooster chased me across the dirt floor of the barn.

公鸡追着我跑过谷仓的泥土地面。《柯林斯例句》

43. You always been good with numbers, rooster.

罗斯特你最有生意头脑了。《provided by jukuu》

44. One time, a rooster attacked me,

有一次一只公鸡袭击我

45. Rooster, we have chicks now.

公鸡先生, 我们现在有小鸡了.《期刊摘选》

46. Nearby were some chicks and a rooster.

附近有几只小鸡和一只公鸡。

47. 72immediately the rooster crowed the second time.

立时鸡叫了第二遍。

48. Is that a rooster?

那是一只公鸡吗?

49. The rooster has chicks now.

公鸡现在有小鸡了。

50. The rooster tweets, and opens the morning.

公鸡的鸣叫开启了早晨。

51. A rooster skips past a fishing boat beached on the rocky shore of Dominica's Scott's Head.

在多米尼加的斯科特海岬,一只公鸡正跳过一艘停在石头海湾上的渔船.《期刊摘选》

52. Rooster: Yes, to good health.

鸡:对,为了健康。

53. The rooster is singing.

公鸡正在唱歌。

54. The fox say: That is a rooster, rooster lay egg how can?

狐狸说: “ 那是一只公鸡, 公鸡怎么会下蛋 呢 ? ”《期刊摘选》

55. Study on Increasing Dietary Protein and Phosphorus Utilization of Rooster

提高肉鸡日粮蛋白质、磷利用率技术的研究

56. If a rooster laid an egg on top of a pointed roof henhouse.

如果一只公鸡下蛋在一个尖顶的鸡舍屋顶上.《期刊摘选》

57. It's a rooster.

这是一只公鸡。

58. Rooster: Robert, good to meet you!

公鸡: 罗伯特,很高兴见到你!

59. Effects of high voltage static electric field on Rooster sperm fertility embryo development

高压静电场对鸡精子受精率及其胚胎发育影响的研究

60. Rooster: The only kind of singer I like is one who wakes everybody up!

公鸡: 我喜欢那种能把所有人都叫醒的歌手!《期刊摘选》

61. The rooster chases and bites him.

公鸡会追他和咬他。

62. To touch a rooster's spur was even worse luck.

触摸公鸡的肉距会带来甚至更坏的运气。《provided by jukuu》

63. And if they had a rooster, we'd know.

如果他们养了公鸡我们会知道的

64. What does a rooster say?

公鸡说了什么?

65. They had black crusts and they crowed like roosters!

它们有着黑色的外壳,它们会像公鸡一样啼叫!《期刊摘选》

66. To Chinese, a rooster is a symbol of strong and proud.

对中国人来说,公鸡是强壮和骄傲的象征。

67. The perfect mate for a Rooster would be an Ox or a Snake.

属鸡的人最好的伴侣是属牛的或属蛇的.《期刊摘选》

68. Just as he was speaking, the rooster crowed.

正说话之间,鸡就叫了。

69. Rooster: Yeah, it's great.

公鸡:是的,太棒了。

70. Mohist answered, "The grog and hop never stop shouting from day to night, but they get little from people. The rooster only sings only for a few minutes in the morning and wakes up all the people. So, it is not necessarily advisable to speak a lot."

墨子回答说:“青蛙和癞蛤蟆的叫声从早到晚没有停过,但是,却几乎没有引起人们的注意。公鸡仅仅只在黎明时分叫上几声,便能将天下的人都唤醒.”因此,话多不一定有好处。

71. How do you tell if one's a rooster?

你怎么知道什么样的是公鸡

72. Research on Problems of Multipoint Response for Rooster

敌我识别器多点应答问题的研究

73. Scientists controlled the light levels in rooster habitats.

科学家们控制了公鸡住所的光照强度。

74. He strut around like a rooster in a hen house.

他像鸡舍里的公鸡一样昂首阔步.《期刊摘选》

75. Has anyone seen a rooster?

有人见过公鸡吗?

76. The Rooster is known to be a very trustworthy person.

属鸡的人是非常值得信赖的人.《期刊摘选》

77. The chicken farm is going to select some good roosters to raise as breeding stock.

鸡场将优选出来的公鸡当作种鸡饲养.《期刊摘选》

78. Rooster: Yeah, long time no see!

公鸡:是啊,好久不见!

79. The rooster , who had been awakened by the noise, cried down from the roof.

被噪音吵醒的公鸡从屋顶跳了下来.《期刊摘选》

80. The characteristic cry of a rooster early in the morning.

鸡啼声清晨公鸡特有的鸣叫.《期刊摘选》

81. Rooster: Man, you don't look so well.

公鸡: 朋友!你看上去不太好啊.《期刊摘选》

82. Jn. 18:27 Then Peter denied again, and immediately a rooster crowed.

约十八27彼得又不承认, 立刻鸡就叫了.《期刊摘选》

83. What was hatched a hen must not try to be a rooster!

直译:孵出来是母鸡就别想冒充公鸡!《期刊摘选》

84. Don't worry, Rooster. Come with us and have some food, then you will feel better.

马:不用担心, 公鸡. 和我们一起吃点东西, 你会感觉好些的.《期刊摘选》

85. The bunch of children played the rooster game in the playground with a lot of laughter.

一群孩子在操场上斗鸡,笑声不断.《期刊摘选》

86. Filomena's wrinkled face was sly. Old roosters can't greet the sun.

斐洛必娜皮笑肉不笑他说: “ 老公鸡不能报晓了,不能欢呼太阳初升了.《教父部分》

87. Once Bin1 Meng went outing on the suburbs. He was surprised to see a rooster pulling out its tail feathers and asked the waiter why the rooster did so.

宾梦到郊外游玩,看见一只公鸡用嘴一根一根地啄掉尾巴上的漂亮的羽毛,感到奇怪,并问侍者公鸡为什么要这样做?

88. One of the long curved tail feathers of a rooster.

雄禽的一种长而弯曲的尾羽。

89. The rooster looks cool!

公鸡太潇洒了!《期刊摘选》

90. Then a lion walked up to the donkey and the rooster.

一会儿一只狮子走近驴子和公鸡.《期刊摘选》

91. The rooster woke up early in the morning.

公鸡一大早就醒了。

92. CLEO : A rooster. Okay, what else?

一只公鸡. 好, 还有什么 啊 ?《期刊摘选》

93. The rooster disappeared under the car.

公鸡消失在车子底下.《期刊摘选》

94. Listen, the rooster is crowing.

听, 公鸡正在报晓.《期刊摘选》

实用例句

1. Peter's Peacocks, the Long Island Blackbirds and the Coastal Carolina Chanticleers (which is some kind of angry rooster).

WSJ: NCAA Tournament: Birds Are Beating Cats and Dogs

2. And this seemed to be greatly upsetting the rooster.

NEWYORKER: Max at Sea

3. Still, if you want a screensaver featuring rooster mascot Footix, this is for you.

CNN: FROM THE WEB

4. When Red Rooster opened a year ago, with its menu of reinvented American food, packed bar and diverse clientele, it put an imprimatur on a neighborhood in transition.

WSJ: Harlem Draws a Restaurant Crowd

5. Recently, Rooster Teeth completed work on the first-ever machinima-created broadcast commercials for Electronic Arts.

FORBES: Magazine Article

6. Little to crow about as the Year of the Rooster nears an end.

FORBES: Faces in Sad Places

7. Kevin Conroy, Blue Rooster founder and president, explained that Madison was developed to provide a simple and clean user experience, requiring little-to-no employee training.

FORBES: Blue Rooster's 'Madison' Offers Alternative To Dropbox For The Enterprise

8. He was awake, and there was a giant rooster before him, no more than twenty yards away in the full glow of the raging fire.

NEWYORKER: Max at Sea

9. If you were born in the year of the Rooster, Dog or Ox (Cow), it is going to be a great year, says the report.

CNN: What fortune will the Year of the Snake bring you?

10. 'Our Chicken Dance comes from the legend of a young man who saw a rooster strutting around to attract females, ' says Treffrey Deerfoot, the twinkle-eyed cultural curator of the Interpretive Centre.

BBC: The perfect trip: The Canadian Rockies

11. Rooster Booster, ridden by Richard Johnson, made all the running and led by up- to 30 lengths at one stage down the back straight.

BBC: SPORT | Other Sport | Horse Racing | Success for Kicking King

12. Aged in oak barrels for at least two years, Chianti Classico wines are identified by a black rooster within a red circle on the neck of the bottle, signaling membership of the Chianti Classico Consortium.

WSJ: Will Lyons on Wine: Consorting With Chianti

13. Not far from Africa Kine, at the Red Rooster restaurant, chef Marcus Samuelson is busy checking orders.

CNN: SHARE THIS

14. The rooster seemed frustrated, staring at another creature, of similar height and heft but with a different shape.

NEWYORKER: Max at Sea

15. It was utterly quiet except for an occasional donkey bray and rooster crow.

CNN: Dancing (with abandon) into old age

16. Mark Rylance's role as Johnny "Rooster" Byron won him best actor awards at the Tony Awards in 2011 and the Olivier Awards in 2010.

BBC: Jez Butterworth returns to Royal Court with new play

17. For more information on Rooster Teeth and more videos, visit RoosterTeeth.com.

FORBES: Magazine Article

18. With a string of awards, rave reviews and features by the BBC, MTV, The New York Times, Wired magazine, CNN and many others, Rooster Teeth's work continues to grow in popularity.

FORBES: Magazine Article

19. Yet they were splashed across the front pages in March when Zara gave Johnson a kiss in front of a huge crowd after he won the Champion Hurdle at Cheltenham on Rooster Booster.

BBC: Zara eyes Olympic spot

20. For a while it struts around like a proud, Bible-thumping rooster, but it finally ends up lame.

CNN: Review: Praise the Lord and pass the editing console for 'The Apostle'

21. It was at once comical it looked like a giant man in a rooster suit and powerful and menacing.

NEWYORKER: Max at Sea

22. That meant accepting Mel Gibson's voice for one of the leading figures, Rocky the Rooster, the film's Steve McQueen character.

ECONOMIST: The trouble with cartoon films

23. The flames rolled right over a rooster coop on the property, but when Creswell came back to assess the damage she found the roosters unscathed.

CNN: Wildfire ravages home but spares family roosters

24. His most acclaimed role in recent years was as Johnny "Rooster" Byron in Jerusalem, which he played at the Royal Court in the West End and on Broadway.

BBC: Vanessa Redgrave and James Earl Jones to reunite at Old Vic

25. Outside, the throaty call of a rooster rings out across the farmyard, and a venerable tractor grumbles noisily by.

BBC: The perfect trip: Brittany and Normandy

26. And the guys said, "Well, you know, The rooster works very hard " The rooster has sex dozens of times a day" " And she said, "Well, be sure to tell that to the president" The story goes, the president went around, the guy tells the story to the president The president asks the man, "Huh Has sex dozens of times each day ?" Same hen every time?"

那人回答说,“那只公鸡很卖力的,每天交配好几十次“,她就说“确保把这告诉总统“,然后总统走过来,那人也跟总统说了这事,总统问他,“每天交配几十次,是和同一只母鸡吗“心理学导论课程节选 : 耶鲁公开课

27. Earlier, the 8-11 favourite Harchibald played a patient waiting game to beat Rooster Booster for the Stan James Christmas Hurdle.

BBC: SPORT | Other Sport | Horse Racing | Success for Kicking King

28. And not only because the main character, the low-life aristocrat of drug dealing and binge drinking, Johnny "Rooster" Byron is played by Mark Rylance in a performance of stomping brilliance.

BBC: News

29. Try the rooster pizza: fried tortilla crust with caramelized onions, cotija cheese, roasted poblanos and house-made chorizo.

FORBES: Dining At The Masters: The Best Eats In Augusta

30. Rooster Teeth's online home, RoosterTeeth.com, now boasts more than 500, 000 registered members and over 1 million video downloads per week.

FORBES: Magazine Article

31. It does mention that those who were born in the year of the Rooster, Dog, and Cow will have the best year.

FORBES: The Week Ahead: Should You Fear the Black Water Snake?

rooster是什么意思_rooster的音标_用法_翻译_短语搭配_权威例句

下载Word文档到电脑,方便收藏和打印~

英语相关推荐

fizzer是什么意思_fizzer怎么读_fizzer的用法_翻译_短语搭配_权威例句

fizzer的意思是:n. 嘶嘶声(计算机病毒)。学考宝为您提供fizzer是什么意思,fizzer的翻译,fizzer的用法,fizzer的短语搭配,fizzer的权威例句等查询,让您轻松学单词。
fizzer是什么意思_fizzer怎么读_fizzer的用法_翻译_短语搭配_权威例句
2024年11月09日

diascope是什么意思_diascope怎么读_diascope的用法_翻译_短语搭配_权威例句

diascope的意思是:n. 投影仪。学考宝为您提供diascope是什么意思,diascope的翻译,diascope的用法,diascope的短语搭配,diascope的权威例句等查询,让您轻松学单词。
diascope是什么意思_diascope怎么读_diascope的用法_翻译_短语搭配_权威例句
2024年11月09日

fierce是什么意思_fierce怎么读_fierce的用法_翻译_短语搭配_权威例句

fierce的意思是:adj. (动作或情感)强烈的,激烈的;(人或动物)凶猛的,狂怒的;(天气等)狂暴的,恶劣的 adv. <美,非正式>很,非常 【名】 (Fierce)(英)菲尔斯(人名)。学考宝为您提供fierce是什么意思,fierce的翻译,fierce的用法,fierce的短语搭配,fierce的权威例句等查询,让您轻松学单词。
fierce是什么意思_fierce怎么读_fierce的用法_翻译_短语搭配_权威例句
2024年11月09日

truncating是什么意思_truncating怎么读_truncating的用法_翻译_短语搭配_权威例句

truncating的意思是:截断。学考宝为您提供truncating是什么意思,truncating的翻译,truncating的用法,truncating的短语搭配,truncating的权威例句等查询,让您轻松学单词。
truncating是什么意思_truncating怎么读_truncating的用法_翻译_短语搭配_权威例句
2024年11月09日

sizz是什么意思_sizz怎么读_sizz的用法_翻译_短语搭配_权威例句

sizz的意思是:vi. 发嘶嘶声 n. 嘶嘶声。学考宝为您提供sizz是什么意思,sizz的翻译,sizz的用法,sizz的短语搭配,sizz的权威例句等查询,让您轻松学单词。
sizz是什么意思_sizz怎么读_sizz的用法_翻译_短语搭配_权威例句
2024年11月09日

fertilizer是什么意思_fertilizer怎么读_fertilizer的用法_翻译_短语搭配_权威例句

fertilizer的意思是:n. 肥料,化肥;受精媒介物。学考宝为您提供fertilizer是什么意思,fertilizer的翻译,fertilizer的用法,fertilizer的短语搭配,fertilizer的权威例句等查询,让您轻松学单词。
fertilizer是什么意思_fertilizer怎么读_fertilizer的用法_翻译_短语搭配_权威例句
2024年11月09日

mushes是什么意思_mushes怎么读_mushes的用法_翻译_短语搭配_权威例句

mushes的意思是:n. 玉米粥;糊状物;软稠的一摊。mush的第三人称单数和复数。学考宝为您提供mushes是什么意思,mushes的音标,mushes怎么读,mushes的翻译,mushes的用法,mushes的短语搭配,mushes的权威例句等查询,让您轻松学单词。
mushes是什么意思_mushes怎么读_mushes的用法_翻译_短语搭配_权威例句
2024年11月09日

serenest是什么意思_serenest怎么读_serenest的用法_翻译_短语搭配_权威例句

serenest的意思是:adj. 安详的;平静的;宁静的。serene的最高级。学考宝为您提供serenest是什么意思,serenest的音标,serenest怎么读,serenest的翻译,serenest的用法,serenest的短语搭配,serenest的权威例句等查询,让您轻松学单词。
serenest是什么意思_serenest怎么读_serenest的用法_翻译_短语搭配_权威例句
2024年11月09日
没有更多了?去看看其它内容

热门文章

  • 辽宁单招18所公办学校 哪些院校比较好
    辽宁公办单招学校有辽宁医药职业学院、辽宁省交通高等专科学校、大连职业技术学院、盘锦职业技术学院、辽宁轨道交通职业学院、辽宁金融职业学院、锦州师范高等专科学校、辽宁农业职业技术学院等等。
  • 浣溪沙 春城即事原文、翻译和赏析
    杨柳春城驻幰车。罗衣掩映女墙斜。江南装束是谁家。城下有人闲伫立,芙蓉朝日望来赊。一春愁绪又添些。
  • 2024高考分数出来后什么时候录取 几号出录取结果
    2024各个高校的录取时间并不一样,但主要都集中在每年的7月至8月。其中高考提前批次录取结果一般会在7月末或者是8月初陆续公布。以收到录取通知书为准,这个没有固定的时间。具体内容小编已经整理好了,一起来看看吧。
  • 点绛唇 其五原文、翻译和赏析
    独上高楼,恨随春草连天去。乱山无数,隔断巫阳路。信断梅花,惆怅人何处。愁无语,野鸦烟树,一点斜阳暮。
  • 菩萨蛮(十之四)原文、翻译和赏析
    帘旌不动薰余热。高堂谁送能言雪。一笑下人间。天风袭坐寒。歌声云外去。句句苏仙语。曲罢一尊空。飘然欲驭风。
  • 吉林省松原市前郭一中名校调研系列卷2023~2024学年.九年级上学期第三次月考历史试卷(含答案)
    名校调研系列卷·九年级第三次月考试卷历史(人教版)一、单项选择题(每小题1分,共10分)1.大河流域孕育了古代灿烂的人类文明。下列诞生于两河流域的古代文明是( )A.古埃及文明 B.古希腊文明 C.古代印度文明 D.古巴比伦文明2.基督教在西欧封建社会发展过程中产生了重大影响。这一宗教
  • 九日原文、翻译和赏析
    欲赋前贤九日诗,茱萸相斗一枝枝。可怜宋玉情无限,争似陶潜醉不知。绿鬓爱随风景变,黄华能与岁寒期。登高回处狂多少,笑杀襄阳拍手儿。
  • xanthation是什么意思_xanthation短语搭配_xanthation权威例句
    xanthation的意思是:n. 黄化;[化学] 黄原酸化作用。学考宝为您提供xanthation是什么意思,xanthation翻译,xanthation短语搭配,xanthation权威例句等查询,让您轻松学单词。
  • 捣衣诗 其二原文、翻译和赏析
    役役滞风波,游人淹不归。亭皋木叶下,陇首秋云飞。寒园夕鸟集,思牖草虫悲。嗟矣当春服,安见御冬衣。
  • 菏泽思途高职单招培训机构招生
    在探讨菏泽单招培训学校时,我们不得不深入了解当前市场上的各类培训机构,并结合其教学质量、师资力量、学生满意度以及行业声誉等多方面因素进行综合评估。小编推荐菏泽思途高职单招培训机构,菏泽本地老品牌,一起来看看!

精选推荐
外语

  • 资源下载
  • 留学