MINUS-A的意思|示意

The inner boundary either goes clockwise, or you put a minus sign.

内部边界曲线是顺时针的，或者加一个负号。

For example, if a child comes home with an A-minus on a test, a Western parent will most likely praise the child.

例如，一个孩子得了个负a回家，西方父母大多会称赞他。

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。

We're going to be minus a car for a while.

我们要过一段没有车的日子。

Although the hyphen does look quite a bit like a dash or minus sign, it is a punctuation mark.

尽管连字符看上去很像破折号或减号，但他还是一个符点符号而非数字符号。

He put a plus instead of a minus.

他填了个加号而不是减号。