The next unit of water might not even exist if we cannot get smart enough to use our single supply of water well.

如果我们不能有效使用我们仅有的水资源的话，那么下一个单元的水将不复存在。

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According to domestic and foreign researchers on the use of science museums, the study established the instructional design of water unit and carry out STS teaching practice.

根据国内外研究者对利用科普场馆资源的教学研究基础，本研究确立水单元的教学设计方案，并进行STS教学实践。

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When sterilizing, never use unit without recommended amount of water.

当消毒，从来不建议使用单位数量的水。

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To leverage its power, Walmart will ask its suppliers to quantify the amount of water, energy, fertilizer, and the pesticides they use, per unit of food produced.

FORBES: Walmart Flexes Its Sustainability Muscles