当前还有另两家公司在努力销售喷气式飞行器。
Two other companies are trying to sell jet packs now.
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广告是给一家喷气机公司的。
It was for one of the jet companies.
这架大型喷气式飞机原属于泛美航空公司，于2002年停飞。
The jumbo jet once flew for Pan Am but was grounded in 2002.
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