提示：点击例句中的单词，就可以看到词义解释

Dan grassed on them to the local police .

丹向当地警方告发了他们。

The rumour that I had grassed on them .

我曾出卖过他们的谣传。

Application of grassed swales in urban non-point source pollution control .

植草沟在城市面源污染控制系统的应用。

Bill must have grassed on us .

比尔肯定把我们出卖了。

Mike must have grassed on us .

麦克一定告发了我们。