She slowly straightened up and rubbed her back.

她慢慢揉了揉背。

The bent strip can straighten up by itself.

这弯曲的金属片自己可以变直。

That picture’s out of true. Can you straighten it up?

那幅挂歪了，你能它弄正吗？

We’d better straighten up the house before they get back.

我们最好在他们回房子收拾好。