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"In theory," says Vallentine, "this can create a high enough temperature to generate super-heated steam.
2018年12月六级真题(第二套)听力 Section C
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According to Harry Vallentine, a Canadian engineer who is researching modern steam technology, a special tank measuring 2 by 10 metres could store over 750 kilowatt hours of energy as high pressure steam, enough to pull a two-cart train for an hour or so.
2018年12月六级真题(第二套)听力 Section C
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As part of the upgrading of its rail yard, Kasselman, who is an inventor and self-proclaimed "steam visionary", is campaigning for a new steam train that runs without any fire and could run on an existing ten- kilometer line, driving tourists and perhaps
2018年12月六级真题(第二套)听力 Section C
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Energy to drive a steam locomotive can be stored in other materials besides water.
2018年12月六级真题(第二套)听力 Section C
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On the one hand, the drive to share is gathering official steam.
2017年12月六级真题(第二套)阅读 Section B
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The liquid is maintained above its melting point until steam is required, at which point the liquid is allowed to turn back into a solid, releasing its stored energy.
2018年12月六级真题(第二套)听力 Section C
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This would generate steam that could be used to fill tanks on a small steam train without the use of fire.
2018年12月六级真题(第二套)听力 Section C