be good at后加什么动词

　　双语例句：

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

　　你必须善于发现潜在的麻烦并加以化解。

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

　　老师要善于举一反三。

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

　　计算机病毒在系统崩溃后往往依然存在。

　　John is good at swimming and basketball.

　　约翰擅长游泳和篮球。