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1.The farmer used a drop grate to collect the rainwater.
农民使用一个漏斗来收集雨水。
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2. The engineer designed a new sieve to improve the efficiency of the filtering process.
工程师设计了一种新的筛子来提高过滤过程的效率。
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3.The scientist used the drop grate to study the flow of water in the river.
科学家使用漏斗来研究河流中的水流。