名词
中文翻译：分级过滤器
同义词：
['graded filter', 'graduated filter']
例句：
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1.The company uses a graduated filter to control the flow of water in its cooling system.
该公司使用分级过滤器来控制冷却系统中水的流动。
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2.The teacher introduced a graduated filter to help students understand the concept of fractions.
老师引入了分级过滤器，帮助学生理解分数的概念。
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3. The engineer used a graduated filter to measure the concentration of chemicals in the sample.
工程师使用分级过滤器测量样品中化学物质的浓度。