名词
中文翻译：无
同义词：
['absence', 'lack', 'deficiency', 'absence of']
例句：
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1. The student was absent from the meeting yesterday.
学生昨天缺席了会议。
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2. There is a lack of funding for this project.
这个项目缺乏资金。
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3. The absence of sunlight can lead to vitamin D deficiency.
阳光的缺失会导致维生素D缺乏。