It is often convenient to use the mole to describe the amount of substance.

用摩尔来表示物质的量通常是很方便的。

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Thecalculation of them is the most important part. Then introduced the new unit'mole', which is used to described the amount of substance.

最重要的定义是摩尔的介绍，一个用来描述物质质量的国标单位之一。

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What's more, although I was getting an adequate amount of calories, it was hard to convince myself that the chalky substance I just drank was dinner.

更难的是，虽然我正获取的是合适分量的卡路里，却很难让我自己相信这种我刚喝下去的白垩色物质就是我的正餐了。

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A BTU is the amount of heat energy needed to raise the temperature of about one-half kilogram of a substance by one degree Fahrenheit.

VOA: special.2010.11.23

A1C is the amount of sugar that has attached to hemoglobin the substance that carries oxygen inside red blood cells in your blood.

CNN: Diabetic neuropathy