在俄罗斯决定关闭所有天然气供应之后，乌克兰与俄罗斯每年一度的天然气争论大幅升级。
The annual gas dispute between Ukraine and Russia escalated sharply after the Russians decided to shut off all gas supplies.
天然气分子不仅是迄今我们发现的浓缩度最高的碳能量载体，而且它们是流体，易于运输。
Gas molecules are not only by far the densest form of carbon energy we've ever discovered; they're also easy to transfer because they're fluid.
从库克湾输出的天然气曾一度是阿拉斯加最廉价的能源，但现在库克湾的天然气也近于枯竭。
Gas supplies in the Cook inlet-which used to mean cheap energy for alaskans-are running out.
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