Who sets the standard for water quality?

　　水質標準由誰來制訂？

　　You can ask for a chemical analysis of your tap water.

　　你可以要求給你的自來水做化學分析。

　　The engine is used for pumping water out of the mine.

　　這臺發動機是用來從礦井中抽水的。

　　What's the depth of the water here?

　　這兒的水有多深？

　　Water is forced through the pipes at high pressure.

　　水在高壓下流過水管。