动词短语
中文翻译：Unknown
同义词：
['keep silent', 'hold back', 'restrain oneself', 'suppress']
例句：
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1. He held his tongue and didn't say a word.
他保持沉默，一句话也没说。
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2. She held her tongue about the secret project.
她对那个秘密项目守口如瓶。
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3. The teacher held his students to silence during the test.
老师要求学生们在考试时保持安静。