under/below/beneath/underneath.导航词义：在…下面

1. under:prep. 在…下面，在…底下.指某物在另一物的下面或底下，两者之间有无一定距离均可。

Two old men are playing chess under the tree.

两个老人正在树下下棋。

Your bag is under the bed.

你的包在床下面。

You'd better lie under a blanket.

你最好盖条毯子躺着。

2. below:prep. 在…下面，低于.指某物所处的位置低于另一物。

Some cities are below sea level.

有些城市位于海平面以下。

Have you heard voices in the courtyard below your window?

你听到窗户下面的院子里有人在说话吗？

3. beneath:prep. 在…下面，在…正下方.指所处位置时，与 under, below 基本同义，但有时强调在某物的正下方，而且较富有文学性。

Many tourists enjoy feeling the warm sand beneath their feet.

很多游客喜欢脚下踩着温暖沙子的感觉。

Beneath the silvery moon, the sea is more attractive.

在银色的月光下，大海更加吸引人。

They slept outside beneath the stars.

他们露宿在繁星之下。

4. underneath:prep. 在…下面，在…底下.与 under 的意思相近，但含有将某物隐藏或遮盖起来之意。

I'll leave the key underneath the mat.

我会把钥匙放在垫子下面。

He used to hide his blonde hair underneath a baseball cap.

他以前常用一顶棒球帽裹住满头金发。

Even she herself has forgotten about the box underneath the floorboards.

甚至她自己也忘了藏在地板下面的盒子。

全部

1·We often slept under the stars.

我们经常在夜空下露宿。《牛津词典》

2·The boat was going under fast.

小船正迅速下沉。《牛津词典》

3·Can you work under pressure?

你能在压力下工作吗？《柯林斯英汉双解大词典》

4·She buried it under some leaves.

她把它埋藏在一些树叶下。《柯林斯英汉双解大词典》

5·The city is under enemy control.

那座城市现处于敌人的控制之下。《牛津词典》

6·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》

7·They move under cover of darkness.

他们在黑夜的掩护下行进。《柯林斯英汉双解大词典》

8·She dived under the water.

她潜入水下。《牛津词典》

9·He scratched himself under his arm.

他在自己腋下挠了挠。《柯林斯英汉双解大词典》

10·His muscles bunched under his shirt.

他衬衫下面的肌肉紧绷绷的。《牛津词典》

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·People are still suffering under the yoke of slavery.

人们仍然生活在奴隶制的枷锁之下。《柯林斯英汉双解大词典》

5·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》

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·Six suspects are being held under the Prevention of Terrorism Act.

根据《防止恐怖法》，六个嫌疑人被拘押。《牛津词典》

4·The government brought in a controversial law under which it could take any land it wanted.

政府推行了一条颇有争议的法律，根据这条法律，政府可以占据任何它想要的土地。《柯林斯英汉双解大词典》

5·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》

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·A gun went off and people cowered behind walls and under tables.

一声枪响，人们缩到墙后或桌子底下躲起来。《牛津词典》

4·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》

5·He hid the baseball bat under his bed.

他把棒球棒藏在床底下。

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·The US trade deficit grew to just under $30 billion in the third quarter.

美国的贸易逆差在第三季度增加到恰好低于300亿美元的水平。《柯林斯英汉双解大词典》

5·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。

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