“减号”造句
加号用于加法;
减号用于减法.
The plus sign is used in addition and the minus is used in subtraction.
一元
减号得到的运算对象的负值.
The unary minus produces the negative of the value.
如果该整数是负值, 那么将使用
减号作为前缀.
If the integer is negative, the representation is prefixed by a minus sign.