重点讲解：
1. get around 到处旅行；游历；
I don't get around much any more.
我不再到处走动了。
2. a number of 若干；许多；
A number of houses were burnt down in the fire.
在火灾中，好些房子给烧毁了。
3. look back 追忆；回顾；
As I look back, scenes of the past leap before my eyes.
追忆往事，历历在目。
4. across the board 影响全体地；全面地；
The worker's wage was increased across the board.
工人的工资全面提高了。