variable

名词 variable:

1. something that is likely to vary; something that is subject to variation
2. a quantity that can assume any of a set of values
   同义词：variable quantity
3. a star that varies noticeably in brightness
   同义词：variable star
4. a symbol (like x or y) that is used in mathematical or logical expressions to represent a variable quantity

形容词 variable:

1. liable to or capable of change
2. marked by diversity or difference
   同义词：varying
3. (used of a device) designed so that a property (as e.g. light) can be varied

1. The temperature was a variable in the experiment.
   在该实验中温度是个变量。
2. Winds are mainly light and variable.
   风力较弱，风向多变。
3. His mood is variable.
   他的情绪多变。