a minus sign的意思|示意

So the spring force is opposing that, so the spring force has a minus sign here to indicate the direction.

弹力方向相反，所以弹力有个负号，来表示方向。

This is minus one over r, so I get m MG over r with a minus sign, and that has to be evaluated between infinity and capital R.

这是r的负值，所以在mMG/r上加-号，它处于,无穷远和R之间。

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。

A negative value is prefixed by a minus sign.

一个负数将以减号作为前缀。

In the last letter he simply wrote out a plus and a minus sign, and I was supposed to cross one out.

最近一封信，他索性把加减号都写好，我只要划掉一个就行。

You would have found a minus sign here, and that's exactly the same.

这里就会有，一个负号，结果完全一样。