重点讲解：
1. urge sb. to do sth. 敦促；力劝；
例句：He denounces people who urge him to alter his ways.
他指责那些督促他改变习惯的人。
2. be included in 把…列为…的一部分；把…算；
例句：A new chapter is included in the second edition.
这本书再版时插入了新的一章。
3. be based on 以…为基础；
例句：Prices are based on very favorable terms.
价格是按非常优惠的条件来算的。
4. be subject to 可能受…影响的；易遭受…的；
例句：The information contained in this document is subject to change without notice.
本文档所包含的信息可随时更改，不另行通知。
