The water is formed from oxygen element and hydrogen element.

水由氧元素和氢元素组成。

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The water is formed from oxygen element and hydrogen element.

水是由氢元素和氧元素组成的。

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It is zero emissions, there is no carbon, he said. And hydrogen is the most plentiful element in the universe.

他说：“它的废气排放量是零，不排放碳，而且氢是宇宙中含量最丰富的物质。”

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The FCX, on the other hand, runs on the world's most plentiful element--hydrogen--and doesn't produce any of the pollution that today's gasoline-powered cars do.

FORBES: Fueling Hope

Clean, silent, (well, OK, a high-pitched whistling sound), uses no fuel whatsoever, except hydrogen, the most plentiful element on the planet, and emits only water vapor.

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But hydrogen is difficult to store because it is the lightest element.

ECONOMIST: A new way to keep hydrogen: Plumage power | The