后背疼

I can´t go out today, my back still aches bad.

今天我不能出去了， 我后背疼得厉害。

B I hurt my back yesterday. I´ve got backache today.

B我昨天伤到了后背。 我今天后背疼。

I think I´m sick and my back is so bad today.

我想我今天是病了，后背疼得厉害。

Back pain can be a tough mystery to solve, but with a doctor´s help you should be able to track down the cause.

后背疼也很难解决，但是如果有一名医生帮助你的话，你也许能够找到疼痛的原因。

Back pain can be an indicator of a serious problem (though not necessarily).

后背疼也许是一系列问题的综合表现（尽管不一定总是）。