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Using tidal energy to produce electricity is much cheaper than using the traditional energy, like coal or gas.

使用潮汐能源发电比使用煤炭或天然气等传统能源便宜得多。

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The electricity (water or gas) is off!

断电(水或煤气)啦！

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Natural gas stoves or gas water heaters are usually connected to a device that safely expels the gas from the home.

VOA: special.2010.02.02

Now, we saw before, or really I should say we accepted before, that for an ideal gas, u was a function of temperature only.

我们已经看到,或者说我们已经接受这样一个事实，即理想气体的内能只和温度有关。

麻省理工公开课 - 热力学与动力学课程节选

Gas phase single atom. So we don't have to deal with work function or any kind of energies associated with some condensed form of matter.

气相的单原子，所以我们不需要再,处理功函数的问题,以及和凝聚态相关的能量问题。

麻省理工公开课 - 固态化学导论课程节选

The company helps oil producers chart underground formations that might contain oil or gas.

FORBES: Optimistic on oil

Basically, a Dollar or Euro is a bill, just like your electric bill or gas bill.

FORBES: Yes, Spanish Crisis Has Triggered the Euro's Endgame

The publicly traded company helps oil producers chart underground formations that might contain oil or gas.

FORBES: The case for oil