重点讲解：
1. tie the knot
结合；结婚；
eg. I really want to tie the knot this years and start a family.
我很想今年结婚，组织一个家庭。
eg. We have decided to tie the knot next month.
我们已决定下月结婚。
2. search for
搜寻；搜索；搜查；寻求；
eg. Police are searching for the culprits.
警方正在搜捕罪犯。
eg. So I must step out to search for my future.
我要出去寻找我的未来。
3. either...or...
（表示在两者或多者中择其一）或者，要么；
eg. Most drugs offer either no real improvement or, at best, only moderate improvements.
大多数药物要么不能使病情真正好转，要么最多只能带来轻微的改善。
eg. study is like sailing against the current ; either you keep forging ahead or you keep falling behind.
学如逆水行舟，不进则退。
4. look forward to sth./doing sth.
期待；盼望；
eg. With something to look forward to she could afford to tolerate and respond.
心里有了奔头，容忍一点和敷衍一点都没有关系。
eg. Also, I look forward to seeing my grandparents and my friends.
我也盼望着去看望我的祖父母和我的朋友。
