A father is a treasure, a brother is a comfort, but a friend is both.
　　父亲是财富，兄弟是安慰，朋友兼而有之。
　　A friend is a second self. 朋友是另一个自己。
　　A friend is never known till a man has need.
　　不到患难时，永远不能认识真正的朋友。
　　A friend to everybody is a friend to nobody. 广交友，无深交。
　　A friend without faults will never be found. 没有缺点的朋友是永远找不到的。
　　A good book is a best friend who never turns his back upon us. 一本好书，莫逆之交。
　　A life without a friend is a life without a sun. 人生无朋友，犹如生活无太阳。
　　A thousand friends are few, one enemy is too many. 朋友千人尚觉少，仇敌一人犹嫌多。
　　A true friend is known in the day of adversity[逆境]. 疾风知劲草，患难见真情。
　　Admonish[劝告] your friends in private, praise them in public.
　　在私底下要忠告你的朋友，在公开场合要表扬你的朋友。
　　We can live without a brother, but not without a friend. 我们生活中可以没有兄弟，但不能没有朋友。
　　When a friend asks, there is no tomorrow. 朋友的要求不要拖。
　　Without a friend the world is a wilderness. 没有朋友，世界就等于一片荒野。