over
You can get travel concessions if you are under 26.26岁以下者乘车可以获得优惠。
It's against the law to leave children under a certain age alone in the house.
I managed to get all three suitcases for under $200.我设法以低于200美元的价格把3个手提箱全买下了。
She ran her first marathon in just under three hours.
You can walk from here to the station in under ten minutes.

SMART Vocabulary: related words and phrases

Small in number and quantity
beggarly
below
bupkis
certain
could count something on (the fingers of) one handidiom
low density
measly
mild
mildness
mingy
minimal
piffling
remote
scantly
slenderly
slenderness
speak
strength
suggestion
thin

underpreposition (EXPERIENCING)

B2
happening during, as a result of, or according to a particular situation, event, rule, etc.: 在…情况下;由于;根据
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 current rules, you need the agreement of at least 6 out of 10 committee members.根据现有的规则，你必须取得委员会十位成员中至少六人的同意。
 under attack, consideration, discussion, etc.
B2
in the process of being attacked, considered, discussed, etc.: 遭受攻击／正在考虑／正在讨论（等等）
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。
 under sedation, anaesthetic, etc.UK
treated in the way mentioned: 处于镇静剂／麻醉剂的作用之下
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。
old-fashionedShe's been under the doctor for a viral infection.她因病毒感染接受了医生治疗。
 be under an impression/belief
B2
to believe something, often wrongly: （常指错误地）以为／相信
He was under the mistaken belief that I was in charge.他误以为是我在负责。
An adult under British law is someone over 18 years old.
He was under attack for daring to criticize the prime minister.
The procedure is carried out under local anaesthetic.
I imagine he's under a lot of pressure at the moment.
Except under clearly defined circumstances, it is illegal in Britain for a company to purchase its own shares.在英国，除非是在明确规定的情况下，否则一个公司购买自己的股票是违法的。

SMART Vocabulary: related words and phrases

Simultaneous and consecutive
accompanied by someone/something
accompaniment
accompany
all the whileidiom
along
fly
go along
heavy rotation
in parallelidiom
in rotationidiom
in tandemidiom
minute
process
simultaneousness
soon
step
straight
successive
successively
turn

You can also find related words, phrases, and synonyms in the topics:

Experiencing and suffering
Medical treatment: treating & caring for people
Medical treatment: doctors & health workers generally
Medical treatment: people who receive medical treatment
Believing

underpreposition (CONTROL)

controlled or governed by a particular person, organization, or force: 受…的控制（或管理）
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什么样子。
People born under (= during the period of) the zodiac 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。
 be under orders
to have been ordered to do something: 奉命，受命
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。
The group flourished under her firm leadership.在她的坚定领导下，该团体出现了欣欣向荣的景象。
He served under Harold Wilson as Transport Minister.
Sleeping Beauty lay under the wicked fairy's spell until the prince woke her with a kiss.睡美人在邪恶仙子的符咒中倒下沉睡，直到王子吻了她一下才醒来。
As a young painter, he studied under Picasso.那位画家年轻时师从毕加索。
Eastern Slavonia is to revert to Croatian government rule next year after a transitional period under U.N. administration.

SMART Vocabulary: related words and phrases

Ruling & governing
administration
affairs of state
ascend
ascend the throneidiom
bipartisanship
government-sponsored
governmental
governmentally
governorate
hard Brexitidiom
oppression
oppressively
oppressiveness
overgovern
subjection
subjugate
subjugation
super-government
the politburo
tinpot

You can also find related words, phrases, and synonyms in the topics:

Giving orders & commands

underpreposition (NAME)

using a particular name, especially one that is not your real name: 用，以（尤指假名）
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。

SMART Vocabulary: related words and phrases

Names and titles
A.N. Other
age
aka
alias
appellation
first name
forename
form of address
given name
good name
pen name
pet name
place name
pseudonym
pseudonymity
trademark
unchristened
under the name ofidiom
unidentified
unnamed

Grammar