One tree does not make a forest.

　　独木不成林。

　　To find friendship offer friendship.

　　以友情换友谊。

　　A man is known by his friends.

　　什么人交哪些朋友。

　　Life without a friend is death without a witness.

　　沒有朋友的生活相当于孤独一人去世。

　　A friend is never known till a man has need.

　　不上患难时，始终不可以了解真真正正的朋友。

　　A friend in need is a friend indeed.

　　在你最须要时发生 朋友上一真真正正的朋友。

　　A father is a treasure, a brother is a comfort, but a friend is both.

　　爸爸是资本，兄弟是宽慰，朋友兼而有之。

　　A frie nd is a second self.

　　朋友是另一个我。

　　Be slow in choosing a friend; slower in changing.

　　挑选朋友要谨慎，革除更应审又慎。

　　A friend exaggerates a mans virtue, an enemy his crimes.

　　朋友传扬人的传统美德，对手夸大其词人的罪行。

　　A friend is best found in adversity.

　　患难见真友。

　　A friend is easier lost than found.

　　得朋友难，失朋友易。

　　True friendship lasts forever.

　　真正的友谊恒久不变。

　　He who mistrusts most should be trusted least.

　　最不信任他人的人最不应该获得信赖。

　　A bosom friend afar brings a distant land near.

　　海内存知己，天涯若比邻。