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X大奖的创建者又带来了另一个激动人心的创意:让火箭动力飞机在空中竞相狂飙, 这个的全新的比赛联盟能从Nascar赛车那儿抢到一点风头吗？
X creator brings another exciting idea: Rocket powered aircraft racing in the air soared, this new league of competition from the Nascar car grab a limelight?