BBC在线收听下载:联合国难民峰会召开

短语讲解：

1. Activists say a number of people have been killed or wounded in the air strikes on rebel held districts in Aleppo at nearby villages.

a number of 一些;许多的
例句：The research begs a number of questions.
研究绕过了一些问题。

2. The French interior minister Bernard Cazeneuve says the security forces have broken up nearly 30 people smuggling networks trying to bring migrants into the UK so far this year.

break up 结束;（使）破碎;放假
例句：Civil war could come if the country breaks up
如果国家分裂就会爆发内战。
so far 迄今为止;到目前为止
例句：What have you found so far?
你到目前为止发现了什么？