短语讲解：

1. She said such a policy should include setting up migrant registration centers at important transit points.

set up 建立; 准备
例句：They set up many branches throughout the country.
他们在全国建立好多分公司。

2. The move left hundreds of migrants waiting outside the station.

hundreds of 好几百，许许多多
例句：Money to the extent of hundreds of thousands was set in motion.
流通的金钱达几十万金元之多。

3. The August 17 bombing killed 20 people and injured more than 100.

more than 多于
例句：Rob likes apples more than bananas.
罗勃对苹果比对香蕉还喜欢。