重点讲解：
1. impose on 强制实行；强加；
The City Council votes unanimously to impose fines on dog owners and to set standards on how much barking is too much.
市议会投票一致同意，将制定狗叫是否过量的标准，并且会对狗的主人征收罚金。
2. be involved in 卷入的；参与的；与…有密切关联的；
I suspect that he is more or less involved in the affair.
我猜他和这件事有点牵连。
3. engage in 参与；从事；
All employees engage in sales, operations, and finance, with no specialization.
所有的员工都参与销售、营运和财务，没有特别的职责划分。
4. converge on 汇集；集中；聚集；
Enthusiasts from around the world converge on Le Mans for the annual car race.
热心的观众从世界各地涌到勒芒市观看一年一度的汽车比赛。