例句：
今天能在这里欢迎您是我极大的`荣幸。
It gives me great pleasure to welcome you here today.
这是我做过的最难的事情之一。
It was one of the hardest things I ever did.
这正是我一直在期待的机会。
This is just the opportunity I've been waiting for.
那是我一生中最快乐的一段时光。
That was one of the happiest moments of my life.