动词
中文翻译：必须
同义词：
['must', 'demand', 'require', 'necessitate']
例句：
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1. You must finish the work before the deadline.
你必须在截止日期前完成这项工作。
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2. She demanded that the meeting be held immediately.
她要求立即召开会议。
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3. He requires a lot of sleep to function properly.
他需要充足的睡眠才能正常运作。