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2.Watt invented the steam engine .
瓦特发明了蒸汽机。收藏指正
3.Who invented the steam engine?
谁发明了蒸汽机?收藏指正
4.Who was steam engine invented by ?
蒸汽机是谁发明的?收藏指正
5.When was the steam engine invented?
蒸汽机是何时被发明的？收藏指正
6.In 1768 the first steam engine appeared.
在1768年出现了第一部蒸汽机。收藏指正
7.a locomotive powered by a steam engine.
用蒸汽发动机作为能量的机车。收藏指正
8.A steam engine transforms heat into energy.
蒸汽机将热转变成能。收藏指正
9.A steam engine transforms heat into power
蒸汽机将热能转变成动力。收藏指正
10.a boat propelled by a steam engine.
用蒸汽机推动的小船。收藏指正
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