At low temperatures the difference in population of atoms between two energy levels, which is the basis of maser action, is greater.

在低温下，作为脉塞作用基础的两个能级之间原子数的差别较大。

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At low temperatures, the difference in population of atoms between two energy levels, which is the basis of maser action, is greater.

在低温下，作为微波激射作用基础的两个能级之间原子数的差别较大。

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At low temperatures, the difference in population of atoms between two energy levels, which is the basis of maser action, is greater.

在低温下，作为微波激射作用基础的两个能级之间原子数的差别较大。

youdao