慢速英语:Methane Gas may Become a Major Power in Rwanda

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短语讲解：

1. There are three lakes in Africa that contain such high levels of carbon dioxide and methane gas that they are at risk of exploding.

at risk 有危险
例句：He saved three children alive at risk of his life. 
他拼命救出了三个孩子。 

2. Carbon dioxide released in the Lake Nyos explosion killed more than 1,700 people.

more than 多于
例句：Margaret needed support more than ever. 
玛格丽特比以往更需要关心。 

3. Some victims were as far as 26 kilometers away.

as far as 只要; 远到…; 据…; 直到…为止
例句： As far as I know, he has gone to town. 
就我所知，他到镇子上去了。 

4. Last month, the company agreed to build a power station at Lake Kivu.

agree to 同意， 赞成
例句：We cannot agree to consign the goods. 
我们不同意寄售此货。