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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 of处于风险
An estimated seven million people are at risk of starvation.
估计有700万人面临着饿死的危险。
2.so the plan for Lake Kivu is to turn methane gas into power.
turn into变成；成为
The fighting is threatening to turn into full-scale war.
这场战斗有可能会演变为全面的战争。
3.But, there are worries that the act of pumping out the gas could cause problems.
pump out抽空
How do you pump out bilge water in the engine room?
您如何将机仓的污水泵出弦外?
4.and they cover all the issues that companies like us have to follow when they extract methane gas from the lake.
extract from从…中提取
How much honey can you extract from a hive this size per year? "
我就问道: “ 象这样一窝蜂,一年能割多少蜜?
