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。

If we don't have an ideal gas.

如果不是理想气体。

For the ideal gas it's this.

对理想气体就是这个。

Just like an ideal gas.

就像理想气体在平衡态。

Ideal gas would be the same temperature.

而理想气体的话两边温度将一样。