friendship：n.友谊;朋友关系;友情;友好
复数： friendships
记忆技巧：friend 朋友 + ship 某种关系 → 友谊
例句：
Their friendship soon deepened into love.
他们的'友谊很快发展成为爱情。
A bond of friendship had been forged between them.
他们之间形成了一种友谊的纽带。
Their friendship blossomed into love.
他们的友谊发展成了爱情。
I treasure his friendship.
我珍重他的友谊。
They vowed eternal friendship.
他们立誓要友谊长存。