Dogs are man's best friends.狗是人类最好的朋友。

英语中还有很多谚语。如，A good friend is like a mirror.好朋友就像一面镜子一样。Friends are like books---you don't need a lot of them as long as they are good.好朋友像书，只要好不需要多。A man is as he feels.老不老，自己晓。