6、Don’t ask others to also do not allow others to do the dirty things, as a principle of friendship既不请求别人也不答应别人去做卑鄙的事情，为友谊的一项原则。 --(古罗马)西塞罗
7、Don’t try to win a friend by presenting gifts. You should instead contribute your sincere love and learn how to win others’heart through appropriate ways.---Socrates, Ancient Greek philosopher不要用馈赠去获得朋友，你必须奉献你诚挚的爱，学会怎样用适当的方法来赢得别人的心。---古希腊哲学家 苏格拉底
8、Friendship is like money, easier made than kept. 友谊如金钱一般，容易得到却不易保持。 ——Samuel Butler
