under
- adv.在下面;小于;在水下;少于;较年轻;在昏迷中
- prep.根据，按照;在…项下;用，以（某一名字）;在(或到、通过)…下面;在…过程中;不足;小于;少于;比…年轻;由…控制（或管理、经营）;在…表面下;由…造成;由…覆盖着
- adj.下面的;较低的
underprep.
在（或到、通过）…下面
in, to or through a position that is below sth
Have you looked under the bed?
你看了床底下没有？
She placed the ladder under (= just lower than) the window.
她把梯子立在窗户下面。
The dog squeezed under the gate and ran into the road.
狗从门底下钻出去，跑到大路上去了。
在…表面下；由…覆盖着
below the surface of sth; covered by sth
The boat lay under several feet of water.
那条船沉在水下好几英尺处。
少于；小于；不足；比…年轻
less than; younger than
an annual income of under £10 000
不到1万英镑的年收入
It took us under an hour.
这事花了我们不到一小时。
Nobody under 18 is allowed to buy alcohol.
未满18岁者不得买酒。
由…控制（或管理、经营）
used to say who or what controls, governs or manages sb/sth
The country is now under martial law.
这个国家目前在戒严中。
The coinage was reformed under Elizabeth I (= when she was queen) .
英国币制在伊丽莎白一世时代作了改革。
She has a staff of 19 working under her.
她手下有19个职员工作。
Under its new conductor, the orchestra has established an international reputation.
在新指挥的领导下，这个乐团建立了国际声誉。
根据，按照（协议、法律或制度）
according to an agreement, a law or a system
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。
Under the terms of the lease you had no right to sublet the property.
按租约条款的规定，你无权转租这房产。
Is the television still under guarantee?
这台电视机还在保修期内吗？
在…过程中
experiencing a particular process
The hotel is still under construction.
旅馆还在兴建中。
The matter is under investigation.
此事正在调查中。
由…造成；受…影响
affected by sth
The wall collapsed under the strain.
墙壁因承受不了重压而坍塌了。
I've been feeling under stress lately.
我最近感到压力很大。
I'm under no illusions about what hard work this will be.
对于这项工作的辛苦，我从不存错误的幻想。
You'll be under anaesthetic, so you won't feel a thing.
你将被麻醉，所以什么也感觉不到。
用，以（某一名字）
using a particular name
She also writes under the pseudonym of Barbara Vine.
她也用芭芭拉∙瓦因的化名从事写作。
在…项下；在（书等中的）某部分
found in a particular part of a book, list, etc.
If it's not under ‘sports’, try looking under ‘games’.
如果在“体育运动”项下查不到，就试试“游戏”项吧。
adv.
在下面
below sth
He pulled up the covers and crawled under.
他揭开被子钻到里面。
在水下
below the surface of water
She took a deep breath and stayed under for more than a minute.
她深吸了一口气，然后潜水一分多钟。
The boat was going under fast.
小船正迅速下沉。
少于；小于；较年轻
less; younger
prices of ten dollars and under
十元及以下的价格
children aged 12 and under
12岁及以下的儿童
在昏迷中；陷入昏迷状态
in or into an unconscious state
He felt himself going under.
他觉得自己将要昏厥。
adj.
only before noun较低的；下面的
lower; underneath
the under layer
下面的一层
the under surface of a leaf
叶子的背面
under
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In addition to the uses shown below, under is also used in phrasal verbs such as ‘go under’ and ‘knuckle under’.
除下列用法外，under还可用于go under，knuckle under等短语动词中。
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2
PREP 在…下面；在…下方；在…底下
If a person or thing is under something, they are at a lower level than that thing, and may be covered or hidden by it.They found a labyrinth of tunnels under the ground.
他们发现了一处迷宫似的地道。
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3
PREP 在（水面）之下；在（水）里
In a place such as a sea, river, or swimming pool, if someone or something is under the water, they are fully in the water and covered by it.They said he'd been held under the water and drowned...
他们说他被按到水里淹死了。
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4
PREP 经由…的底下
If you go under something, you move from one side to the other of something that is at a higher level than you.He went under a brick arch...
他穿过一个砖砌的拱门。
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5
PREP 在（尤指一层衣服）的里面（或底下)
Something that is under a layer of something, especially clothing, is covered by that layer.I was wearing two sweaters under the green army jacket...
我在绿军装里套了两件毛线衫。
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6
PREP 受…影响；经历
You can use under before a noun to indicate that a person or thing is being affected by something or is going through a particular process....fishermen whose livelihoods are under threat...
生计受到威胁的渔夫
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7
PREP 在（…情况或条件）下
If something happens under particular circumstances or conditions, it happens when those circumstances or conditions exist.His best friend was killed by police under extremely questionable circumstances...
他最好的朋友在极其可疑的情况下被警察打死了。
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8
PREP 根据，按照，依照（法律、协定、制度等）
If something happens under a law, agreement, or system, it happens because that law, agreement, or system says that it should happen.Under law, your employer has the right to hire a temporary worker to replace you...
根据法律规定，你的雇主有权雇用一名临时工来代替你。
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9
PREP 在（…领导）下；在（…当政）期间；在（…统治）之下
If something happens under a particular person or government, it happens when that person or government is in power.There would be no new taxes under his leadership.
在他主政期间不会增加新税种。
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10
PREP 在…指导下(学习)；在…手下(工作)
If you study or work under a particular person, that person teaches you or tells you what to do.Kiefer was just one of the artists who had studied under Beuys in the early Sixties...
基弗只是60年代早期师从博伊斯的艺术家之一。
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11
PREP 用（…之名）；以（…的名义）；假借（…之名）
If you do something under a particular name, you use that name instead of your real name.Were any of your books published under the name Amanda Fairchild?...
你们所出版的书里有署名为阿曼达·费尔柴尔德的吗？
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12
PREP 在…之下；在…部分里
You use under to say which section of a list, book, or system something is in.This study is described under 'General Diseases of the Eye'...
“普通眼科疾病”这一部分里对该项研究作了描述。
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13
PREP （年龄或数量）不足，低于，在…以下
If something or someone is under a particular age or amount, they are less than that age or amount....jobs for those under 65...
适合65岁以下人群从事的工作
adj
-
1
- located below or beneath something else
- nether garments
- the under parts of a machine
- Synonym: nether
adv
-
1
- further down
- see under for further discussion
- Synonym: below
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2
- down below
- get under quickly!
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3
- below the horizon
- the sun went under
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4
- below some quantity or limit
- fifty dollars or under
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5
- in or into a state of subordination or subjugation
- we must keep our disappointment under
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6
- down to defeat, death, or ruin
- their competitors went under
-
7
- into unconsciousness
- this will put the patient under
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8
- through a range downward
- children six and under will be admitted free
数据来源：WordNet
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Simple things such as a leaf from a tree you sat under can keep the memories of your travel alive for years to come .
一些简单的东西，比如你在下面坐着的那棵树上的一片叶子，就能让你的旅行记忆在未来的岁月中历历在目。
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Terms under which this service is provided to you .
这种服务在下面被提供给你的术语。
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Families will be better off under the new law .
新法律会使家庭经济宽裕一些。
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Families will be better off under the new law .
这项新法律将使每个家庭的经济较前宽裕。
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It took two hours to bring the fire under control .
花了两个小时才控制住火势。
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Only then did she realize the stress he was under .
直到那时她才意识到他所承受的压力。
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The shop is now under new management .
这家商店现由新的经营者管理。
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The drug should only be used under medical supervision .
这种药须遵医嘱方可使用。
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The plans have been under discussion for a year now .
这些计划至今已讨论一年了。
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Some people can only operate well under pressure .
有些人只有在压力下才工作得好。
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She is under contract to a major American computer firm .
她已签约为一家大的美国计算机公司工作。
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Life imprisonment is defined as 60 years under state law .
按照州法律终身监禁定义为60年。
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Under normal circumstances , I would say ' yes ' .
一般情况下，我会说“行”。
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The competition is open to young people under the age of 18 .
这项比赛让18岁以下的青少年参加。
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Don 't let him get under your skin .
别让他惹你生气。
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Special conditions apply if you are under 18 .
18岁以下者按特殊情况处理。
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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。
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She has a staff of 19 working under her .
她手下有19个职员工作。
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The experiments were carried out under simulated examination conditions .
试验是在模拟的情况下进行的。
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The railway is still under construction .
这条铁路仍在建设之中。
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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。
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The health minister has come under fire from all sides .
卫生部长受到来自各方的责难。
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We felt the ground give way under our feet .
我们感觉到脚下的土地下陷了。
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We are working under extreme pressure at the moment .
目前我们正在极大的压力下工作。
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He asked to be put under police protection .
他请求警方保护。
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There 's no need to flap ─ I 've got everything under control .
不必担心——一切都已在我控制之中。
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I had to bend double to get under the table .
我必须弓着身子才能钻到桌子底下。
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Don 't worry ─ everything 's under control !
别担心，一切都控制住了！
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The hotel is still under construction .
旅馆还在兴建中。
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The city is under enemy control .
那座城市现处于敌人的控制之下。
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。
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？
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。
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。