英语相应的俗语是“don't judge a book by its cover” （别以封面而定论一本书的好坏）,不过既然楼主想要的是直译,那么可以参考以下说法：- 1.Never judge a man by his looks,as we could never define the value of an ocean with a tiny bucket. 2.Clothes and looks do not make the man,a tiny bucket does not suffice to measure the grandeur of the sea.
