夫市之无虎明矣，然而三人言而成虎这句话的翻译

街市上没有老虎是一件很明了的事情，可是，三个人的流言就能使虚无的老虎象真有一样了。

It was apparent that there does not exisit a tiger in the town, but there seemed to be one after 3 people said yes.

the description of the thing is more serious than the truth itself.