... 发射的电子 ejected electron 发射的类型 type of emission 火炮发射的原子弹 AFAP ...
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Finally, Declan looked at the BMW Hydrogen 7 - its only emission is water vapour but the technology for this type of green car is still being developed and currently, there are no models on sale.
BBC: NEWS | Programmes | Breakfast | Low carbon family: "Green" cars
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