BBC在线收听下载:奥巴马呼吁全球行动起来遏制埃博拉的蔓延

1. The director of the FBI James Comey says the bureau has identified the masked Islamic State militant who carried out the recent beheadings of two US journalists and a British aid worker.

carry out 执行; 进行; 完成
例句：They should also carry out some fundamental reforms.
这些政府也应该执行一些基础性的改革。

2. The United States has said it's too early to say that the coalition it's leading is winning the fight against the Islamic State militants.

too...to... 太…以致不能…
例句：It's too early to tell.
现在做判断还为时过早。

3. Scientists say at least 500 million computers could be at risk from a newly discovered bug which could make them vulnerable to remote cyber attacks.

at least 至少
例句：At least she is a paragon with her feet on the ground. 
她至少是一个脚踏实地的特殊人物。 

4. The Islamists are also said to have destroyed a number of churches and Christian homes in the town and attacked a nearby village.

a number of 许多的; 一些
例句：A number of local personalities were present at the meeting. 
一些当地名人出席了会议。 

5. How fast we can arrest the spread of this disease is within our control and if we move fast even if imperfectly, then that could mean the difference between 10,000, 20,000, 30,000, that's versus hundreds of thousands or even a million deaths.

even if 即使，纵然; 虽然
例句：Be proactive, even if it hurts.
要有前瞻性，即便这可能会带来伤害。

6. She and two male colleagues blasted off from the Baikonur Cosmodrome in Kazakhstan to take over at the International Space Station.

take over 带; 接管
例句：A younger generation will begin to take over.
年轻一代将会开始接管中国的事务。