Mother alone supported the whole family by working on the 30 mu of land.

抗战以后，我才能和家里通信。

" mu" " k" times " Fn" and the " mu" " k"

" mu" " k" 乘以 " Fn" 并且 " mu" " k" 将是 0.

One mu equals roughly 0.067 hectares.

一亩约等于 0. 067 公顷。

So this is also, we just have to remember that mu is equal to p.

所以这也是，我们只需要记住mu等于p。

So minus mu K so the force of friction--- I'll just put force of friction.

所以减去 mu K 所以摩擦力 --- 我只输入摩擦力。

Remember, our true mean is this, that the Greek letter mu is our true mean.

请记住，我们的真实意思是，希腊字母 mu 是我们的真实意思。

So this is the Greek letter mu, and we put this k here for kinetic, or we can kind of say moving friction.

k表示" 动" (kinetic)该系数等于摩擦力的大小。

So mu sub P2 with a bar over it.

所以 mu sub P2 上面有一个横条。

So this is going to be equal to mu, which is going to be equal to p.

所以这将等于 mu，这将等于 p。

Have this inequality expressed in terms of mu.

用 mu 表示这种不平等。