名词
中文翻译：筛子
同义词：
['sieve', 'screen', 'filter']
例句：
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1. The engineer used a number sieve to separate the sand from the gravel.
工程师使用一个数筛来将沙子和砾石分开。
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2. She counted the grains on the number sieve to make sure they were all evenly distributed.
她用数筛上的颗粒数来确保它们均匀分布。
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3. The farmer used a number sieve to sift through the wheat for defects.
农民使用一个数筛来筛选小麦，找出缺陷。