随着年龄增长，你会遇到各种疼痛和不适。

As you get older, you have all sorts of ___aches and pains.

我下背部有点痛。

I've got an ___ache in my lower back.

从那以后，我的左腿就一直痛。

Since then, I have had an ___ache in my left leg.