重点讲解：
1. as opposed to
而不是；
eg. We ate in the restaurant, as opposed to the bistro.
我们是在餐厅吃的饭，而不是在小饭馆。
eg. I am here on business as opposed to a holiday.
我在这里是办公事而不是度假。
2. in the past
过去；以往；
eg. I've been there many times in the past.
我从前去过那儿很多次。
eg. In the past this district was very hard to get to.
以前这一带交通闭塞。
3. look forward to sth./doing sth.
期待；盼望；
eg. After a day of hard work, we look forward to good relaxation.
辛辛苦苦工作一天之后，大家都想好好放松一下。
eg. We look forward to reactivating our business relationshellop.
我们盼愿我们的业务关系能够重新活跃起来。
