That summer vacation is really impressive for me, for I knew a bosom friend.
那个暑假想起来，真的很难忘，因为我认识了一个很好的`朋友。
I want a few bosom friends, unbound by ceremony, and willing to confide in me.
我要几位知心友，不必拘守成法，肯向我尽情吐露他们的苦衷。
The two countries, cold and distant in the past, have suddenly become bosom friends.
这两个在过去疏远冷漠的国家突然变成密友。