at
at1preposition
expressing location or arrival in a particular place or position
[指所在或到达地点]在；在…旁
they live at Conway House.
他们住在康威豪斯。
she was constantly at the telex machine.
她一直待在电传机旁。
they stopped at a small trattoria.
他们停在一家意大利小餐馆旁。expressing the time when an event takes place
[指事件发生的时间]在…时刻；在…时候
the children go to bed at nine o'clock.
孩子们9点钟上床。
his death came at a time when the movement was split.
就在运动四分五裂时他去世了。
he was defeated at the election of December 1910.
他在1910年12月的选举中被击败了。
■(followed by a noun without a determiner) denoting a particular period of time
[后接不带限定词的名词]在…期间；在…时刻
the sea is cooler at night.
夜间海水更凉。
the force landed at dawn.
部队在凌晨登陆。
■(followed by a noun without a determiner) denoting the time spent by someone attending an educational institution, a workplace, or their home
[后接不带限定词的名词，指某人在校、在工作单位或在家的时候]在…时
it was at university that he first began to perform.
他最初开始演出是在大学时。
we all need to get involved in fighting crime whether it's at work, at home, or at school.
不论在工作，在家，还是在学校，我们都必须参与打击犯罪。denoting a particular point or segment on a scale
[指度量上的某一点或某一段]以；达
prices start at £18,500.
以18，500英镑起价。
driving at 50 mph.
以每小时50英里的速度行驶。
learners of English at advanced levels.
高级英语学习者。
■referring to someone's age
[指年龄]在…岁时
at fourteen he began to work as a postman.
14岁时他开始干邮递员的工作。expressing a particular state or condition
处在…状态
with a ready smile to put Mrs Jones at ease.
总带着微笑好让琼斯夫人放松。
placed them at a serious disadvantage.
置他们于不利之地。
the coroner accepted that the machines were at fault.
验尸官承认是机器出了错。
■expressing a relationship between an individual and a skill
在…方面
boxing was the only sport I was any good at.
拳击是我惟一擅长的体育项目。
he is poor at giving instructions.
他不善于发号施令。expressing the object of a look, gesture, thought, action, or plan
向，朝；对于
I looked at my watch.
我看了看手表。
Leslie pointed at him.
莱斯利朝他指了指。
I was amazed at how well the hair kept its shape.
我惊诧于发型保持得如此之好。
policies aimed at reducing taxation.
旨在降低税收的政策。
■expressing the target of a shot from a weapon
（武器）瞄准，以…为目标
they tore down the main street, firing at anyone in sight.
他们捣毁了大街，朝看见的每个人开火。
■expressing an incomplete or attempted action, typically involving repeated movements
（尤指反复的动作）（抓）住；（抓）向
she clutched at the thin gown.
她企图抓住那件薄薄的睡衣。
Shelley grabbed at his arm.
雪莱一把抓住他的手臂。expressing the means by which something is done
[指方法、途径]用，以
holding a prison officer at knifepoint.
用刀尖顶住监狱官。
her pride had taken a beating at his hands.
她的骄傲受到了他的打击。
常用词组at all
见 all
at first
见 first
at it
engaged in some activity, typically a reprehensible one在从事（应受指责的）活动
the guy who faked the Hitler diaries is at it again.
那个伪造希特勒日记的家伙又在胡编乱写。
at last
见 last
at least
见 least
at most
见 most
at once
见 once
at that
in addition; furthermore而且；此外
it was not fog but smoke, and very thick at that.
那不是雾而是烟，而且很浓。
not at all
见 notwhere it's at
(informal)the fashionable place, possession, or activity(非正式)时髦的地方（或物品、活动）
New York is where it's at， stylewise.
纽约是时尚方面的好去处。
语源Old English æt, of Germanic origin; related to Old Frisian et and Old Norse at, from an Indo-European root shared by Latin ad 'to'at2[ɑːt, at]noun
a monetary unit of Laos, equal to one hundredth of a kip阿特（老挝货币单位，100阿特＝1基普）
语源Thai