每个数学问题都有一个解决方案;这只是找到正确视角的问题。
太阳是我们在非洲最强大的工具。我们必须学会与它合作,而不是对抗它。
"We always overestimate the change that will occur in the next two years and underestimate the change that will occur in the next ten. Don't let yourself be lulled into inaction."