floating data的用法和样例：
例句
- The nullability property of arithmetic operators over floating point data type is always nullable.
对浮点数据类型执行运算的算术运算符的为空性属性始终可为空。 - Unless your target platform includes a floating-point coprocessor, you'll pay a very large penalty for manipulating float data in your program.
除非你的目标平台上有浮点运算协处理器，否则你的程序会在处理浮点数据上花费大量开销。
