As the atoms continue to drift through space, they cool and condense into dust grains.

原子继续在太空里漂移，冷却压缩成尘埃颗粒。

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The less food in each, the faster they cool — that helps prevent the growth of harmful microbes.

每份食物的份量越少，它们降温得越快，这样有利于阻止有害微生物的生长。

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Second, the high surface-to-volume ratios of such bodies promote heat loss, so they cool quickly between successive impacts.

第二，这类天体的表面积对体积比值高，促使散热更快，因此在各次撞击之间会快速冷却。

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Second, the high surface-to-volume ratios of such bodies promote heat loss, so they cool quickly between successive impacts.

第二，这类天体的表面积对体积比值高，促使散热更快，因此在各次撞击之间会快速冷却。

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