视频对白:

The ex in ex-lover is not a variable.
这个前恋人的前可不是变量。

variable

n.可变因素，变量

The potassium content of foodstuffs is very variable.
食物中钾的含量差别很大。

There was a bit of a wind and it was blowing onshore, variable, but quite strong.
有一阵风朝岸上吹来，风向变化不定，但风力很强。