translation.en: Each streaking dot represents a passenger plane, and by turning air traffic data into time-lapse imagery, we can see something that's above us constantly but invisible: the vast network of air travel over the United States.
translation.zh: 每条划过的蓝点都代表一架客机， 当我们把客机的数据 转化成延时图像时， 我们看到了那无法看见 却一直在我们头顶的： 美国上空广大的航线网络。