友谊是双方的事。
12、A friend to everybody is a friend to nobody.
广交友，无深交。
13、Friendship is like wine---the older the better.
友谊像美酒， 越陈越醇厚。
14、Friends are like wine; the older, the better.
朋友象酒，越久越淳。
15、There is no friend so faithful as a good book.
最忠实的朋友莫过于一本好书
