重点讲解：
1. in advance
提前；事先；
eg. The subject of the talk is announced a week in advance.
会谈的主题已提前一周宣布。
eg. To make sure that he was at home, I called him up in advance.
为了确定他在家，我事先打电话给他。
eg. British Summer Time is one hour in advance of Greenwich Mean Time.
英国的夏季时间比标准时间快一小时。
2. the more... the more...
句型，常表示越……就越……；
eg. The harder he worked, the more he got.
他工作越努力，得到的就越多。
eg. The longer the war lasts, the more the people there will suffer.
战争持续得越久,那里的人们受难就越多。
eg. The more, the better.
多多益善。