adjective

[原级]

易变的，多变的；时好时坏的；可变的，可调节的；（数）（数字）变量的；（植，动）变异的，变型的；（齿轮）变速的

The potassium content of foodstuffs is very variable.

食品中钾的含量是多变的。

noun

[具体名词]

可变性，可变因素；（数学中的）变量，变元；（计算机）变量（元）；（天文）变星的简称；（东北信风带以北或南半球的东南信风带与西风带之间的）变风区

A variable is a factor that can change in quality, quantity, or size, that you have to take into account in a situation.

可变因素