Air travel has two advantages over train travel. First, it can save much time.We can fly from Beijing to Guangzhou jusi in two hours, but by train, we have to spend 24 hours or more. Second, air travel is more comfortable, because the plane flies so

潜艇大战，游戏中可切换多种风格的游戏画面。还包括了空军作战部队，要特别注意躲闪上空连发炮弹。游戏操作方法：空格键：发子弹，方向键：控制潜艇(Submarines war, the game can switch a variety of style of the game. The air force operations were also included, with special attention to the Dodge projectiles over the air. Game