•Because I'm a bad swimmer, I often go under and swallow a lot of water.因为不善于游泳，我经常沉到水下，喝了不少水。

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•Thousands of companies went under during the recession.经济衰退期间，成千上万的公司倒闭了。

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•He hid under the bed.他躲在床底下。

•In AD 79 the city of Pompei was buried under a layer of ash seven metres deep.西元79年，庞贝古城被湮没在七米深的火山灰下。

•She put the thermometer under my tongue.她把温度计放到我的舌头下面。

•She was holding a file under her arm (= between her upper arm and the side of her chest).她腋下夹着一个文件夹。

•They stood under a tree (= below its branches) to avoid getting wet.他们站在树下避雨。

•The main fields are under wheat.主要的农田都种了麦子。

•Books on Cecil Beaton will probably be under Art or Photography rather than Drama.关于塞西尔‧比顿的书很可能属于艺术或摄影类，而不属於戏剧类。

•Trifle? That comes under Puddings and Desserts.酒浸果酱松糕应在布丁和甜点类中找。

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•All items cost/are under a pound.所有物品价格均低于一英镑。

•The discount applies only to children under (the age of) ten (= younger than ten).折扣仅为十岁以下儿童而设。

•If you get under 50%, you've failed the exam.如果考分低于总分的一半，你就没有及格。

•The work was completed under very difficult conditions.这项工作是在极端困难的情况下完成的。

•Now that the deadline is approaching we all feel under pressure.由于最后期限就要到了，我们都感受到了压力。

•The chair broke under his weight (= because he was too heavy for it).他太重了，椅子承受不住被压坏了。

•Under the present rules, you can buy ten litres of wine.根据现行规定，你可以买十升酒。

•The town is under fire (= is being attacked) from the air.该城正遭受空袭。

•The proposals are now under consideration by the Board of Governors.理事会正在考虑这些提议。

•The situation is still not under control.局势仍然没有得到控制。

•The patient is being kept under heavy sedation.病人正处于服药后的深度镇静状态。

•She'll have to go under anaesthetic for the operation.手术前必须给她施行麻醉。

•He was under the mistaken belief that I was in charge.他误以为是我在负责。

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•He's a Colonel, with hundreds of soldiers under him (= obeying his orders).他是一名上校，手下有数百名士兵。

•I wonder what Britain was like under the Romans (= during the time when the Romans controlled Britain).我想知道英国在罗马人统治时期是甚么样子。

•People born under (= during the period of) the star sign Pisces are supposed to be dreamy and artistic.有人认为，双鱼座的人爱幻想、有艺术细胞。

•They're under strict orders not to discuss the situation.他们被严令不得讨论时局。

•He's under doctor's orders (= has been told by a doctor) to cut down on fatty food and to drink no alcohol for at least six months.医生告诫他要在至少半年的时间内少吃油腻食物、滴酒不沾。

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•He writes under the name (of) John le Carré.他用约翰•勒•卡雷这个名字创作。

•For his own safety, he has to operate under a false name/an alias.为了自身安全，他不得不使用假名／化名。

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•She fell under his spell when he was her tutor at university.在他担任她的大学导师时，她被他深深吸引住了。