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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Unsymmetrical dimethylhydrazine (UDMH) is the main fuel of liquid rocket propellant. Stress is always laid on the pollution of UDMH to water.

偏二甲肼（UDMH）是 液体 推进剂的主体燃料，其对水体的污染一直倍受重视。

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The pattern of liquid rocket propellant seep and steam diffusion is discussed in this paper, and the model of quantitative analysis is also established.

讨论了航天发射场液体推进剂泄漏及蒸汽逸散的模式，并建立了定量分析模型。

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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.

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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.

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

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