be good at后加什么動詞

　　雙語例句：

　　You have to be good at spotting trouble on the way and heading it off.

　　你必須善于發(fā)現(xiàn)潛在的麻煩并加以化解。

　　A teacher should be good at drawing inferences about other cases from one instance.

　　老師要善于舉一反三。

　　Viruses tend to be good at surviving when a computer system crashes.

　　計算機病毒在系統(tǒng)崩潰后往往依然存在。

　　John is good at swimming and basketball.

　　約翰擅長游泳和籃球。