名词
中文翻译：比例泵
同义词：
['proportional flowmeter', 'proportional valve例句：1. The proportion of the population that is overweight is increasing.（超重人口的比例正在增加。）']
例句：
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1. The proportion of the population that is overweight is increasing.
超重人口的比例正在增加。
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2. The proportional pump was designed to handle a specific volume of fluid.
比例泵被设计来处理特定体积的流体。
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3. The proportional pump was used to control the flow of oil in the engine.
比例泵被用来控制发动机中油的流动。