absolute zero temperature

No ifs and buts, at absolute zero temperature, this is exactly 9, 192, 631, 770 hertz.

这个频率不存在“如果和但是”，绝对零度的条件下，9192631770赫兹，不会有任何偏差。

The temperature scale that turns out to be well—defined and ends up giving us the concept of an absolute zero is the ideal gas thermometer.

理想气体温标它有精确的定义，并能引出绝对零度的概念。

Unfortunately, the standard definition of a second relies on what the atom does at a temperature of absolute zero. Real clocks need to run at room temperature, where the shell of electrons puffs up.

遗憾的是，一秒钟的标准定义依赖于原子在绝对零度的条件，而实际的时钟需要在室温下运行，室温条件下电子壳层膨胀了。