名词
中文翻译：不足
同义词：
['deficiency', 'inadequacy']
例句：
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1.The lack of funds has made it difficult for the project to proceed.
资金的缺乏使得项目难以推进。
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2. Due to the insufficient data, we cannot make accurate predictions.
由于数据不足，我们无法做出准确的预测。
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3.The teacher noticed that the students were not sufficiently engaged in class discussions.
老师注意到学生们在课堂讨论中不够积极参与。