The most important thing is to keep thinking, keep questioning.
剑鞘保护剑的锋利，自己却满足於它自己的迟钝。
每首诗都是一首情诗，即使它是关于失去的。
The role of education in economic development cannot be overstated; it is the foundation upon which innovation and productivity are built.
Time is a slippery thing: lose hold of it once, and its string might sail out of your hands forever.
时间是个滑溜溜的东西：一旦失去控制，它的线索可能会永远从你手中溜走。