retain + noun
保留抽象名词，如composure, control, dignity等。
She managed to retain her composure during the interview.
她在面试中设法保持了镇定。
保留；保持
记住；记得；留住；锁住；保留；聘请；常接 from:阻止(某人或某物)；制止,防止,约束,止住。；(指事物)把(某物)保持在里面；容纳。
to continue to have or keep something, such as a feature or an employee
常接 from:阻止(某人或某物)；制止,防止,约束,止住。
Often followed by from: to hold back (someone or something); to check, to prevent, to restrain, to stop.
(指事物)把(某物)保持在里面；容纳。
Of a thing: to hold or keep (something) inside it; to contain.
牢固地固定(某物)；防止(某物)脱落或分离。
To hold (something) secure; to prevent (something) from becoming detached or separated.
保持对(某物)的控制或占有；继续拥有(某物)；扣留。
To keep (something) in control or possession; to continue having (something); to keep back.
保留(某物)而不移除或废除；保存。
To keep (something) in place or use, instead of removing or abolishing it; to preserve.
聘请或雇用(某人),尤指临时地。
To engage or hire (someone), especially temporarily.
使(某人)继续受雇或服务；亦指(主要为历史用语)供养(某人)作为依附者或随从。
To keep (someone) in one's pay or service; also, (chiefly historical) to maintain (someone) as a dependent or follower.
控制或克制(自己)；对(自己)加以自制。
To control or restrain (oneself); to exercise self-control over (oneself).
宣告(罪过)不予赦免。
To declare (a sin) not forgiven.
保持控制或占有；继续拥有。
To keep in control or possession; to continue having.
能够将某事记在心里；运用记忆力。
To have the ability to keep something in the mind; to use the memory.
(指身体或身体器官)留住组织或物质。
Of a body or body organ: to hold back tissue or a substance.
一般现在时
She retains a lot of information after reading.
她阅读后记住很多信息。
一般过去时
He retained his composure during the crisis.
他在危机中保持了镇定。
现在完成时
They have retained the same policies for years.
他们多年来一直保持相同的政策。
规则变化，过去式直接加-ed。
The old building still retains its original character.
这座老建筑仍然保留着它原来的特色。
用法提示：retains 是 retain 的第三人称单数形式，在此作及物动词，表示“保持、保留”。
Please retain your receipt until the warranty period ends.
请保留您的收据，直到保修期结束。
用法提示：retain 是动词原形，用于祈使句，作及物动词，表示“保留、留着”。
Even under pressure, she retained her composure.
即使在压力下，她依然保持着镇定。
用法提示：retained 是 retain 的过去式，作及物动词，表示“保持（镇定）”。
保留抽象名词，如composure, control, dignity等。
She managed to retain her composure during the interview.
她在面试中设法保持了镇定。
表示以某种身份留用或聘请某人。
The company retained him as a legal consultant.
公司聘请他担任法律顾问。
常用于法律语境，指付费聘请律师或专家。
They decided to retain a top lawyer for the case.
他们决定为这个案子聘请一位顶级律师。
与retain基本同义，但更常用，语气较弱，适用于日常情境。
强调维持原有水平或状态，多用于抽象事物如关系、系统、水平。
侧重保护以免受损或变质，常用于文物、环境、传统等。
grammar · medium
易错句子The old traditions still retain.
正确表达The old traditions are still retained.
Retain是及物动词，必须带宾语；若主语是受动者，需用被动语态。
grammar · medium
易错句子Please remain the receipt for future reference.
正确表达Please retain the receipt for future reference.
Remain是不及物动词，不能直接带宾语；表示‘保留’应使用及物动词retain。
maintain侧重维持某种状态或水平（如速度、关系、设备），而retain强调继续拥有或保留某物（如权利、职位）。
obtain指通过努力获得原本没有的事物，retain指继续持有已有的事物。
保持控制
The company managed to retain control of the market.
这家公司设法保持了对市场的控制。
记住信息
Students need to retain information for the exam.
学生需要记住信息以应对考试。
保温
This material retains heat very well.
这种材料保温效果很好。
保水
The soil retains water after heavy rain.
大雨后土壤会保持水分。
聘请律师
He decided to retain a lawyer for the case.
他决定为这个案件聘请一名律师。
保住职位
She worked hard to retain her position in the company.
她努力工作以保住自己在公司的职位。
re- (again) + tain (hold)
con- (together) + tain (hold)
main- (hand) + tain (hold)
ob- (toward) + tain (hold)
sus- (up from below) + tain (hold)
常与retain搭配，如retain memories，表示保持记忆。
retain knowledge表示保留或记住知识。
retain employees指留住员工。
retain water表示保持水分。
retain control指保持控制。
保持镇静
She managed to retain her composure during the crisis.
她在危机期间设法保持了镇静。
留住水分；水肿
Some people with kidney problems retain water easily.
有些肾脏问题的人容易水肿。
聘请律师
He retained a lawyer to handle the legal matter.
他聘请了一位律师来处理法律事务。
Dictionary facts from ECDICT, WIKTIONARY.