Free education is abundant, all over the Internet. It's the desire to learn that's scarce.

可持续性不是一种趋势，而是我们对未来的责任。

The man who lets a leader prescribe his course is a wreck being towed to the scrap heap.

互联网是一个创新的平台，但它也需要负责任的使用。

距离不仅仅是物理上的度量，还是社会和经济上的障碍。