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A small amount. either of movement or substance.
一小点，动作或物质。
youdao
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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。
youdao
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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。
youdao