Well, if we just take, for example, MgO, and let's try Mg, magnesium chloride just as an example.

我们以MgO为例，让我们试试Mg，MgCl2也是一个例。

麻省理工公开课 - 固态化学导论课程节选

Therefore, it'll compress by an unknown x, which is equal to mg divided by the force constant of the spring.

因此它的压缩量为 x,也就等于 mg 除以弹簧的弹性系数

耶鲁公开课 - 基础物理课程节选

When I was not accelerating and everything was at rest, ma was 0, w was mg, and w was the reading on the needle.

当我还没有加速,一切静止的时候,ma 是 0,w 就等于 mg,w 就是指针的读数

耶鲁公开课 - 基础物理课程节选

I know this is the right answer, because if I now find the acceleration, I find it's mg divided by m and I get -g as the answer for all bodies.

我知道这个等式是正确的,因为现在如果我要求物体的加速度,用 mg 除以 m,我就得到 -g,这个结果对所有物体都成立

耶鲁公开课 - 基础物理课程节选