名词
中文翻译：Unknown
同义词：
['residue', 'sediment', 'settler']
例句：
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1. The solution was left to settlefor a few hours before it was testedagain.
溶液被留置几个小时后再次测试。
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2. The sediment settled at the bottom ofthe container.
沉积物在容器底部沉积。
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3.The settler removed the heavier particles fromthe liquid.
沉降器从液体中移除较重的颗粒。