常見例句"If everyone in the United States were balanced on a map, a trucker crossing Steelville's Main Street would once have straddled the center of gravity. 如果美國的每個人都能在地圖上保持平衡的話，那麼這個正在穿越斯蒂爾維爾大街的卡車司機一度跨立在地心引力的中心。 返回 Steelville