It made the US the world's top gas producer in 2009.
这使得美国在2009年成为世界上最大的天然气生产国。
So it's like an inert gas sitting on top of the water.
所以这里的情况是在水的上方,有一部分惰性气体。
As solar and wind prices continue to fall, natural gas will stay on top.
尽管太阳能和风能价格持续下跌，天然气却仍将保持成本优势。
This gas is led off from the top of the furnace to be used.
煤气从高炉顶部引出加以利用。
This gas is led off from the top of the furnace to be used.
煤气从高炉顶部引出加以利用。
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