BBC在线收听下载:伊斯兰国宣称处决中国和挪威人质

短语讲解：

1. According to the report, almost a quarter of the centrifuges in store have been removed since October.

according to 根据，按照
例句：According to her, grandfather called at noon.
据她说,祖父在中午打来电话。

2. It's thought both attacks were carried out by the Islamic Group Boko Haram.

carry out 履行
例句：No matter what we do, we must carry out our duties.
无论干什么工作,我们都应履行自己的职责。

3. The scientists used human cells to grow layers of tissue which they tested in voice boxes taken from dead dogs, descent air through them using an artificial wind pipe and were able to produce some realistic sounds.

be able to 能够; 能
例句：We shall not be able to furnish additional copies.
我们将不能提供额外的副本。

4. The researchers say the work offers hope to the millions of people who suffer from voice impairment.

suffer from 患（某种病），受（某种病痛）折磨
例句：I often suffer from unaccountable headaches.
我常莫名其妙地头疼。