趁热过滤除去合金中的铜、砷。
在重复使用液态煎炸油之前，应过滤除去食物残渣。
Before you reuse liquid deep fryer grease, it should be strained to remove old crumbs and food particles.
环保局负责地下水及饮用水的办公室主任辛西娅·多尔蒂表示，环保局已有规定要求90%的污染物必须从饮用水系统中过滤除去。
Current EPA regulations say that more than 90 contaminants must be filtered out of drinking-water systems, said Cynthia Dougherty, director of EPA's Office of Groundwater and drinking water.
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