Therefore some scientists postulate that the Earth's earliest atmosphere, unlike that of today, was dominated by hydrogen, methane, and ammonia.

因此，一些科学家推断，地球早期的大气与现在的不一样，主要由氢、甲烷和氨构成。

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Natural bugs can turn out both hydrogen and methane.

天然的细菌可以生产氢气和甲烷。

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Life generates methane, ammonia, oxygen, hydrogen, carbon dioxide, and many other gases.

生命生产出甲烷、氨气、氧气、氢气、二氧化碳以及其他气体。

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As we see a little bit later, I could talk about the carbon-hydrogen bond in methane where there is a plurality of bonds. In this case, there is only the one bond but I just want to get the formulas.

因为我们后来看到一点点，我能讨论甲烷中的碳氢共价键,那有许多共价键，这种情况下，这只有一条共价键,但我想得到氟。

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"Economics dictates that 95% of current U.S. hydrogen is produced by steam-methane re-forming of non-renewable natural gas, " Michael K. Heiman, professor of environmental studies at Dickinson College, wrote in a study of the proposed hydrogen economy last year.

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According to a new computer model, liquid methane in contact with a partially hydrogen-terminated diamond surface at extremely high pressures and temperatures spontaneously forms longer hydrocarbons, and hence the material of crude oil could be formed deep in the earth.

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But this portion could grow, given the hassles of making hydrogen:It requires a six-story furnace, called a steam-methane reformer, where natural gas combines with steam and nickel at 1, 600 degrees Fahrenheit to unleash hydrogen gas.

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