No ifs and buts, at absolutezerotemperature, 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。
2
The temperature scale that turns out to be well—defined and ends up giving us the concept of an absolutezero 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。
3
Unfortunately, the standard definition of a second relies on what the atom does at a temperature of absolutezero. Real clocks need to run at room temperature, where the shell of electrons puffs up.