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1·The cat is under the table.

猫在桌子底下。youdao

2·He acts under the rules.

他根据规则行事。youdao

3·She is under 18 years old.

她年龄未满18岁。youdao

4·The ship sails under the water.

船在水下航行。youdao

5·The apple is under the blanket.

苹果在毯子底下。youdao

6·We communicate under a friendly way.

我们以友好方式交流。youdao

7·The price is under 10 dollars.

价格低于10美元。youdao

8·The little dog is under the chair.

小狗在椅子之下。youdao

9·He is under the family's love.

他承受着家庭的爱。youdao

10·The answer is under this page.

答案在这页以下。youdao

之下

1·They feel under permanent threat.

他们感觉处在持续不断的威胁之下。《柯林斯英汉双解大词典》

2·He never gets ruffled , even under pressure.

即使在压力之下，他也从不感到沮丧。《牛津词典》

3·I have schooled myself to remain calm under pressure.

我练就一副在压力之下保持镇静的本领。《牛津词典》

4·She wrote a letter of apology but only under protest.

她无奈之下写了一封致歉信。《牛津词典》

5·The road is nominally under the control of UN peacekeeping troops.

那条路名义上是在联合国维和部队的控制之下。《柯林斯英汉双解大词典》

根据

1·Religious practices are permissible under the Constitution.

根据宪法，宗教行为是可允许的。《柯林斯英汉双解大词典》

2·You could get them under the Trade Descriptions Act for that!

你可以根据《商品说明法》将他们绳之以法。《牛津词典》

3·Immigration officials were allowed to enter the country and naturalize soldiers under the 1942 law.

根据1942年法，移民局官员可以让士兵进入该国并加入该国国籍。《柯林斯英汉双解大词典》

4·Approximately 20 states prosecute these cases under existing criminal laws.

大约有20个州根据现有的刑事法律起诉这些案件。

5·Although illegal in America and most other parts of the world, under Swiss law this is no crime.

尽管这在美国以及世界绝大部分的国家是非法的，但根据瑞士法律却并不是犯罪。

以下

1·Children under five are excepted from the survey.

五岁以下的儿童不在调查之列。《牛津词典》

2·Children under 16 cannot give consent to medical treatment.

16岁以下的儿童不得自行同意接受治疗。《牛津词典》

3·The law prevented the employment of children under ten in the cotton mills.

法律禁止棉纺厂雇用十岁以下的童工。《牛津词典》

4·Both companies are similarly priced at just under $40.

两家公司的定价都差不多，都在40美元以下。

5·Children under 15 years are free and must be accompanied by an adult.

15岁以下儿童票价免费，但需在成人的陪同下。

底下

1·Someone had poked a message under the door.

有人从门底下塞进了一张纸条。《牛津词典》

2·Slowly, he clawed his way out from under the collapsed building.

他艰难地从倒塌的大楼废墟底下慢慢爬了出来。《牛津词典》

3·He tried to muffle the alarm clock by putting it under his pillow.

他把闹钟塞在枕头底下，想减低声音。《牛津词典》

4·He hid the baseball bat under his bed.

他把棒球棒藏在床底下。

5·You have the money hidden under your tongue.

你把钱藏在舌头底下了。

低于

1·Shares were trading at under half their usual value.

那些股份以低于通常价值的一半买卖。《牛津词典》

2·Coogan has run a personal best of just under four minutes.

库根跑出了刚好低于四分钟的个人最好成绩。《牛津词典》

3·People who earn under a certain amount are not liable to pay tax.

收入低于一定数额者不必纳税。《牛津词典》

4·Both are similarly priced at just under $40.

两家公司的定价都差不多，都略低于40美元。

5·All clothing on sale after the show for under $60.

展览结束后，所有的服装都以低于60美元的价格出售。

以

1·It then encrypts the index using a searchable encryption scheme and encrypts the unique key with an attribute-based encryption scheme under an appropriate policy.

然后它会使用可搜索的加密模式对索引进行加密，用基于属性的加密模式以恰当的手段对唯一密钥加密。

2·Outside forces should not get involved under any excuse.

外部势力不应以任何借口介入。

3·Find those methods that are called from the method under test and provide an implementation that behaves like the real object would.

找到那些以测试里的方法命名的方法，并提供一个行为像真实对象那样的实现。

4·After staying several months with her relatives, practicing her English, sheheaded to Hollywood to begin a new life under a new name: Ayn Rand.

她在亲戚家住了几个月，练习了自己的英语后，就启程前往了好莱坞。 在那里，她开始了自己的新的生活，以一个新的名字：艾茵·兰德。

5·Conversion may come under many shapes, and it may be brought about in many ways.

转变可能以多种形态来临，可能有许多方式促使其发生。

未满

1·Children under five years of age are not charged.

未满5岁儿童免费。《新英汉大辞典》

2·The lucky winners were all under 20 when they applied.

这些幸运的胜出者申请时全部未满20岁。

3·Since Meridia may increase blood pressure, some doctors prescribe it to those under the age of 40 with no other heart disease risk factors.

因为西布可能会导致血压升高，所以一些医生只给那些未满40岁切没有其他心脏疾病的人们开这种药。

4·Parents must now give their consent before their children under 21 can get a card.

未满21岁的孩子必须得到父母的许可才能获得信用卡。

5·In international terms, an underage soldier is anyone recruited under the age of 18; a child soldier is under 15 years of age.

在国际条款中规定，任何未满18岁就被征召入伍的人就是未成年士兵。

承受着

1·On the one hand, many animals are under pressure from human activity encroaching on their traditional living spaces.

一方面，许多动物承受着人类活动侵占它们传统生存空间的压力。

2·Yet, these same factories are under more and more intense pricing pressure from their customers.

然而，这些厂商也正承受着来自其客户越来越大的价格压力。

3·But their effort to band together in the European Union is under strain.

但是他们所做的在欧盟范围内团结起来的努力也是承受着压力的。

4·But he is under pressure from two rival factions.

皮尔·巴格斯承受着来自两大派别的压力。

5·And while Europe's bond markets are in better shape than they were a few months ago, they're still under considerable pressure.

尽管欧洲的债券市场比几个月之前的情形有所改善，却仍承受着相当大的压力。

在水下

1·The boat lay under several feet of water.

那条船沉在水下好几英尺处。《牛津词典》

2·HUMAN beings no longer thrive under the water from which their ancestors emerged, but their relationship with the sea remains close.

人类已不再其祖先发源在水下繁衍，然而与海洋的关系依然密切。

3·American millionaire Rob Innes created a shark called Seabreacher X: a James Bond-style. craft that can dive under water and jump 12 feet into the air.

美国百万富翁罗伯·伊恩斯制造了一个名为“海洋开道车x”的“鲨鱼玩具”——一辆即可在水下疾驰亦可跃出水面12英尺的詹姆斯·邦德式飞船。

4·The toothpicks will help suspend the avocado pit in water and keep the top part of the pit in fresh air and the fat base of the pit under the surface of the water.

牙签可以帮助把油梨核在水里撑起来，让上部在新鲜空气里，肥大的下部在水下。

5·Student submariners gather at the Naval Surface Warfare Center in Maryland to compete in a race that tests their engineering skills-and ability to pedal under water.

建造潜艇的学生们聚集在马里兰州的海军水面作战中心来参加一次比赛以测试他们的工程技能- - -和在水下踩踏板的能力。

(1)down under澳洲或新西兰地区

(1)go undervt. 破产；沉没；屈服；失败

(1)over and under叠排式；（商品损耗量的）波动量；立式双筒短枪