重点讲解:
1. take effect 开始实施;生效;
The new law takes effect from tomorrow.
新法令明日起生效 。
2. add to 增添;增加;
Shall I ad d your name to the list?
我可以把你的名字写进名单吗?
3. in exchange for 作为交换;
Would you like my old TV in exchange for this camera?
用我的旧电视机换这架照相机,你愿意吗?
4. opt out of 决定退出;决定不参加;
Employees may opt out of the company's pension plan.
雇员可选择不参加该公司的养老金计划 。