translation.en: On the vertical axis, I'm going to show you how much light bulbs -- what our energy consumption per person is, and we're at 125 light bulbs per person, and that little blue dot there is showing you the land area of the United Kingdom, and the population density is on the horizontal axis, and we're 250 people per square kilometer.
translation.zh: 纵轴代表灯泡个数， 也就是平均每人的能源消耗量 我们是每人125个灯泡 那个蓝点的面积可以反映 英国的土地面积， 横轴是人口密度， 我们是每平方公里250人。