plus-minus sign的意思|示意

I don't want to have a plus and a minus sign there have to think about that it means the same thing.

考虑同一物体时，我可不愿把符号倒来倒去。

To find the time to consider, do in a day, plus or minus sign.

要找出时间来考虑一下，一天中做了什么，是正号还是负号。

Yacc can recognize patterns of tokens; for instance, as in the example above, it can recognize that an expression can consist of a value, either a plus or minus sign, and another value.

yacc可以识别出记号的模式；例如，如上面例子中所示，它可以识别出一个表达式可能由一个值、一个加号或者减号以及另一个值构成。

It has changed from a minus sign to a plus sign because of this positive acceleration.

速度的符号已经，由负变正了，可是加速度又还是正的。

It also details in concrete terms the composition of the three tokens (a plus sign, a minus sign, and an integer) that the parser expects to encounter while scanning through the input stream.

它还详细描述了三个记号(加号、减号和整数)组合的具体项，解析器在扫描整个输入流时希望遇到这些项。

If you call this plus, then if you get a minus sign, you know that the velocity is in the opposite direction.

你若称此为正号，你若想要一个负号，你们知道的，相反方向的速度。