In fact, 24 per cent of our galaxy elemental mass consists of helium, which makes it the second most abundant element in our universe.

事实上，银河系中24%的元素质量是由氦组成的，这使它成为宇宙中第二丰富的元素。

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Oxygen is the third most abundant element in the cosmos, after hydrogen and helium.

氧是宇宙中第三丰富的元素，仅次于氢和氦。

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But the major ingredient of semiconductors is silicon, the second abundant element on earth.

但是，半导体的主要成份硅，是地球上第二大丰富的元素。

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Heleim is the 2nd most abundant element in the universe, but most of it is in places like the Sun.

FORBES: What Great Helium Shortage?

Nitrogen is by far the most abundant element in the Earth's atmosphere but most of it stays aloof in a form which living things can't use.

BBC: Leaving our mark: Fossils of the future

Carbon could also be used as a fuel, NASA scientists speculate, and the process would turn the carbon into nitrogen, the most abundant element in the atmosphere.

FORBES: NASA: A Nuclear Reactor To Replace Your Water Heater