The hours I spent with you in the university were happiest of my life.
和你在大学一起度过的时光是我一生中最幸福的时光。
I like to look back on my high-school days, which were the happiest in my life.
我喜欢回顾我的中学时代，那是我生命中最快乐的时光。
I must be the happiest woman on earth!
我一定是世界上最幸福的女人了。
