You shall never believe what he say because he is a fibber.

你决不可相信他的话，因为他是个爱撒小谎的人。

You shall never believe what he say because he is a fibber.

你决不可相信他的话，因为他是个爱的人。

You should never believe what he says because he is a fibber .

你决不可相信他的话，因为他是个爱撒小把的人。

By the way, I think you are more interested in synthetic fibber.

顺便提一下，我想您对合成纤维更感兴趣吧。

The pragmatic fibber is one who lies when the situation calls for it.

功利撒谎者是那种当形势需要时会撒谎的人。