remain calm
collocation保持冷静
Try to remain calm during the emergency.
在紧急情况下尽量保持冷静。
保持；仍是
remains — third person singular of remain
留下；停留；剩下；剩余；有待；留待；留下；逗留；在他人或其他部分离开或消失后仍留下。；剩余；余下；不包括在内。
to continue to be in the same state or condition; to stay unchanged
留下；逗留；在他人或其他部分离开或消失后仍留下。
To stay after others or other parts have been removed or otherwise disappeared.
剩余；余下；不包括在内。
To be left after a number or quantity has been subtracted or cut off; to be left as not included or comprised.
保持；继续存在；维持不变；经久。
To continue unchanged in place, form, or condition, or undiminished in quantity; to abide; to stay; to endure; to last.
等待；交由；留给。
To await; to be left to.
继续处于某种状态。
To continue in a state of being.
一般现在时
She remains confident despite the difficulties.
尽管困难重重，她依然保持自信。
一般过去时
After the storm, only a few houses remained.
暴风雨过后，只剩几座房子。
现在完成时
The problem has remained unsolved for years.
这个问题多年来一直未解决。
remain 常作系动词，后接形容词或名词，表示‘保持’或‘仍然是’。
After the party, only a few guests remained to help clean up.
聚会结束后，只有少数客人留下帮忙打扫。
用法提示：表示“留下”，是不及物动词，后接地点或目的状语。
She remained calm even when the situation became chaotic.
即使情况变得混乱，她仍然保持冷静。
用法提示：表示“保持（状态）”，后接形容词补足语。
The cause of the accident remains unknown despite thorough investigation.
尽管进行了彻底调查，事故原因仍然未知。
用法提示：表示“仍然是”，后接形容词或名词短语。
stay 更常用于指物理位置保持不变，而 remain 更正式
continue 强调动作的持续，而 remain 强调状态不变
persist 语气更强，暗示面对阻碍仍不改变
保持冷静
Try to remain calm during the emergency.
在紧急情况下尽量保持冷静。
保持沉默
He chose to remain silent about the incident.
他选择对这件事保持沉默。
保持不变
The rules remain unchanged for this year.
今年规则保持不变。
留在原地
Please remain in place until further notice.
请留在原地，直到另行通知。
留下；逗留
Some students remained behind after class to ask questions.
一些学生课后留下问问题。
保持坐着
All passengers should remain seated until the plane has stopped.
所有乘客应保持坐着，直到飞机停稳。
常与remain搭配，表示状态未变
强调持续不变的状态
表示动作或状态继续
指事物被留下或未被使用
强调继续存在或发生
有待观察
Whether the new policy will be effective remains to be seen.
新政策是否有效还有待观察。
蒙在鼓里
The public remained in the dark about the company's financial troubles.
公众对公司的财务问题一直蒙在鼓里。
保持秘密
The details of the negotiation remain a secret.
谈判的细节仍是个秘密。
Choose the next layer that will help you use remains with more confidence.
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Dictionary facts from ECDICT, WIKTIONARY.