a gone case

例句：

1. 1. This is a good example ofhow to solve a problem.
   这是一个解决问题的好例子。
2. 2. The lawyer presented several cases incourt.
   律师在法庭上提出了几个案例。
3. 3.He gave me an example of how todo it.
   他给我举了一个如何做的例子。