英音听力讲解:社交网站Facebook的股价今天创新低

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短语讲解：

1. It is the third largest producer of platinum in the world – almost all of which comes from this one mine.

come from 来自
例句：Ambient noise may come from any direction. 
外界噪声可以来自任意方向。 

2. We must carry out the  obligation, and of course we fully intend to do so.

carry out 执行
例句： I myself will firmly carry out this plan. 
我本人将坚决执行这个计划。 

3. The number of people killed in bomb and shooting attacks in Iraq on Thursday has climbed to at least forty-five.

at least 至少
例句：At least, I sincerely hope so. 
至少我是真诚地这样希望的。 

4. This restriction is imposed to protect newly floated shares from extreme volatility if too many people sell at once.

at once 立刻
例句：Let s pack up and start at once. 
让我们整理好行李立刻出发。 

5. However, some think many investors, who have seen the share price drop so much since May, may have hung onto their shares to avoid selling them at a loss.

at a loss 迷茫
例句： I'm at a loss what to do next. 
我不知道下一步怎麽办.