1.DC police are putting out the words litterbugs are not welcome in the nation's capital.

顿特区的警察将在首都内贴出扔垃圾者不受欢迎的标志。

2.It's not nice to be a litterbug, leaving your rubbish around.

一个扔垃圾的人并不好，到处扔垃圾。机翻