当做“朋友关系”的时候是可数.比如：a close friendship.亲密的朋友关系。当做“友情”,一种感觉时,是不可数名词，比如your friendship is very important to me。你的友情对我非常重要。
Friendship用法用作名词(n.)
My friendship with them grew to be considerable.
我与他们之间的友谊渐增。
To me, our friendship is a very precious thing.
对我来说,我们之间的友谊是非常珍贵的。
True friendship should last forever.
真实的友谊应永恒不渝。
I valued my friendship with my classmates.
我珍视我和同学之间的友谊。
