1. First assign the variable, then concatenate and then run it. 首先分配了变数，然后再连接，然后再运行。
2. Is the initialization of a variable consistent with its memory type? 审查是否变量的初始化与它的内存类型一致。
3. The radiation radius of the radioactive radium radiator in the stadium is variable. 放射的镭暖气装置的辐射半径在体育场是易变的。
英英解释
n.
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
3. a star that varies noticeably in brightness
4. a symbol (like x or y) that is used in mathematical or logical expressions to represent a variable q adj.
1. liable to or capable of change
2. marked by diversity or difference
3. (used of a device) designed so that a property (as e.g. light) can be varied
