Conclusion Chronic effect, induced by liquid rocket propellant, was observed in our study.

结论液体火箭推进剂致伤后的远期效应明显。

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Vanderbilt University scientist Michael Goldfarb came up with an alternative power source: rocket propellant.

Vanderbilt大学的科学家Michael Goldfarb带给公众一种可选的能量来源：火箭助推燃料。

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Rocket propellant has barely changed in the more than 50 years since the launch of the first artificial satellite Sputnik.

自第一颗人造卫星史泼尼克发射以来，火箭推进剂在超过50年的时间内变化不多。

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But some are also thought to harbour water ice, which could be used as a raw material for the manufacture of rocket propellant or even breathable air.

BBC: New venture 'to mine asteroids'

After setting a record mission rate of seven flights in 2009, launch attempts in the early months of this year experienced a series of frustrating postponements as engineers grappled with a faulty pressure regulator on the rocket's propellant system.

BBC: Ariane rocket completes flawless satellite launch

Yet the ability to stir up that kind of excitement, among consumers, at least, is the propellant in Apple's rocket.

FORBES: Chief Executive Steve Jobs