translation.en: This can transport a small payload today, about two kilograms, over a short distance, about 10 kilometers, but it's part of a wider network that may cover the entire country, maybe even the entire continent.
translation.zh: 它们可以载重两公斤左右的物资， 飞行约10公里的距离， 不过这只是一个大网络的一个小部分， 一个大网络可以覆盖整个国家、 甚至整个非洲大陆的范围。