重点讲解：
1. in fact （用于修正、引出相反意见或对比等）事实上，其实；
例句：In fact, personal contact is the best way to exchange our view.
事实上，个人接触是交换看法的最好途径。
2. to be honest 老实说；说实在的；
例句：To be honest, I don't plan in that much detail.
说实话，我的目标没有那么具体。
3. be involved in 卷入的；参与的；与…有密切关联的；
例句：She was intimately involved in the project.
她已投到这个项目中去。
4. take on 承担，接受；
例句：I'm overworked at the moment I've taken on too many commitments.
我目前劳累过度——应承的事情太多了。
