Races

master race n. 优等民族 obstacle race 障碍赛跑 arms race n. 军备竞赛 human race 人种 races against time races to the bottom races to the top races out of the traps races of truth races off race to the bottom 比烂 race out of the traps race against time 和时间赛跑,争分夺秒 race to the top race against the clock 争分夺秒