隻比火箭慢一點,大約65分鍾--真空火車!6000-8000 公裏/小時,約4000-5000 英裏/小時
火箭太麻煩,還要進出大氣層!
隻比火箭慢一點,大約65分鍾--真空火車!6000-8000 公裏/小時,約4000-5000 英裏/小時
火箭太麻煩,還要進出大氣層!
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