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And，kT，is，here

And，kT，is，here

And，kT，is，here

And，kT，is，here

1

kT Well when it's like this , the temperature is so low that there's not nearly enough thermal energy to populate any of these states .

在这儿，And，kT，is，here 。，当它像这样，温度这么低，以至于没有足够的热运动，能使分子跃迁到不同的能态。

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