He used to be prone to anger .

他过去动辄发怒。

You may be prone to nervous tension this month.

这个月你或许会倾向于紧张和焦虑。

Why should the stressed brain be prone to habit formation?

为什么有压力的头脑倾向于形成某种习惯？

All these areas will be prone to delays and postponements.

这些领域都容易被拖延和推迟。

Which of the following systems could be prone to a normal accident?

以下那一个系统容易有正常事故？