But most of that grain is not used to feed people. 但大多数粮食没有用来养活人口
But worldwide only three percent of farmers have use of a tractor. 但是世界上仅百分之三的农民使用拖拉机
A liter of oil generates as much energy... 一升石油产生的能量
As 100 pairs of hands in 24 hours, 相当于100双手劳作24小时
A country of farmers became a country of agricultural industrialists. 农业国家变成了机械化农业国家
The phenomenal revolutionary power of black gold. 黑色黄金非凡的革命性能量
Which in turn permitted the invention of skyscrapers. 电梯又促使了摩天楼的发明
Electricity resulted in the invention of elevators, 电力导致电梯的发明