a friend to all is a friend to none

A friend to all is a friend to none.
对一切人都是朋友 ,对哪一个也不是朋友.
A friend is easier lost than found.
朋友易失不易得
A friend is known in necessity.
患难见友情
A friend's frown is better than a fool's smile.
朋友对你皱眉 ,胜过傻瓜对你微笑.