The glomeruli filter fluid from your blood, extracting both waste products and substances your body needs — sodium, phosphorus and potassium.

肾小球过滤血液，从中摄取代谢废物和各种身体所需物质——钠、磷和钾（译者：离子？）

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This is because new regulations, due to come into force in 2011, will require crematoriums to filter out toxic substances such as dioxins and mercury from waste gases.

这是因为将在2011年生效的新法规规定火葬场要过虑出废气中像二恶英，水银这样的有毒物质。

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Here bulrushes filter and treat waste products added by waterfowl and algal production in the deep pool.

这里的芦苇过滤和对待废品、藻类产量增加了水禽深池。

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The lymph nodes normally filter the cellular waste products and debris from infections that travel through the lymph ducts.

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Cooler still is the method the arm deals with waste heat and steam: just like a regular arm, it's allowed to filter up through a permeable skin, producing "sweat" -- the same amount of perspiration you'd get on a warm summer day, according to the team.

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