News Plus慢速英语:美国50年控烟虽有成效 560万孩子仍会短命

重点讲解：
1. add to
添加；增加；掺加；
eg. I have nothing to add to my earlier statement.
我对我先前说的话，没有什么补充的。
eg. His deeds add much lustre to his reputation.
他的行为使他声誉大增。
2. die from
死于；
eg. In big cities during cold winter months, many old people die from the polluted air.
在大城市里，在寒冷的冬季，许多老年人死于污染的空气。
eg. The plants died from want of water.
这些植物因缺水而死。
3. go on to do sth.
（做完某事后）进而，接着（做另一件事）；
eg. We went on to exploit the victory.
我们继续扩大战果。
eg. He went on to talk about his accident.
他接着谈到了他的意外事故。