高手帮我把这句话翻译成英文,谢!

外表一词选‘appreance’为最佳。
What we must（need to) know is not just (simply) the apperance of it.
括号中的词或短语供选择。

What we need to know is not only its surface.

What we need to know is not only its appearance.

What we need to konw is not just about its appearance.
呵呵，这是我的理解，希望能帮助你！

We should know more than its appearance.

What we need to find out cannot be just its appearance.
不知道满意不~