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“守口如瓶”，是一个汉语成语，意思是闭口不谈，像瓶口塞紧了一般（keep one's mouth shut as that of a jar）。比喻说话谨慎，严守秘密，可以翻译为“seal one's lips”，或“ be tight-mouthed”。
例句：
他对她的身份守口如瓶。
He closely guarded her identity.
无论出什么事，他都会守口如瓶。
No matter what happened, he would not say a word.
约翰有意说出来，但玛丽要他守口如瓶。
John wanted to talk, but Mary told him to keep his lips buttoned.
Editor: Jade
