重点讲解：
1. impose on 强制实行；强加；
But they can still impose debts on you.
但他们仍然可以向你施加债务。
2. in charge of 主管；全面负责；统领；
He is in charge of the school work.
他负责学校工作。
3. take part in 参加；参与；
His toes are hurt and he is unable to take part in today's basketball game.
因脚指受伤，他不能参加今天的篮球赛了。
4. come into effect 生效；
The new law will come into effect next month.
新的法律下个月生效。