variable

多变的、易变的、不稳定的

The weather in the mountains is highly variable this time of year.

这个季节山区的天气变化非常大。

可变的、可调的

The fan has three variable speed settings.

这台风扇有三段可调的速度。

参差不齐的、不一致的

The quality of their service is rather variable.

他们的服务品质相当参差不齐。

变数、变因、因素

Weather is the biggest variable in planning an outdoor wedding.

天气是筹备户外婚礼时最大的变数。

变数、未知数数学、电脑

You need to declare the variable before you can use it.

你必须先宣告这个变数才能使用它。