[数]变数, 可变物, 变量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
