First we need to identify actual and potential problems.

　　首先，我們需要弄清實際的問題和潛在的問題。

　　There are three sizes ─ small, medium and large.

　　有三種尺寸——小號、中號和大號。

　　We're going to Germany for Christmas and New Year.

　　我們要去德國過圣誕和新年。

　　We all try and help one another.

　　我們都盡力互相幫助。

　　The project wasted a considerable amount of time and money.

　　那項工程耗費了相當多的時間和資金。