例句：

　　我們觸及了這個問題的根源。

　　We got to the root of the problem.

　　咱們還是回到問題的焦點(diǎn)吧。

　　Let's come back to the point at issue.

　　我們必須找到問題的根源。

　　We have to get to the root of the problem.