学习的意愿是一种内在动机，其来源和奖励都在于其自身的实践。
The will to learn is an intrinsic motive, one that finds both its source and its reward in its own exercise.
I think it's very important to have a feedback loop, where you're constantly thinking about what you've done and how you could be doing it better.
It is India that gave us the ingenious method of expressing all numbers by means of ten symbols, each symbol receiving a value of position as well as an absolute value.
不必担忧财富不多，只须担忧财富不平均，不必担忧人口稀少，只须担忧境内不安宁。……既来了，要使他们安家乐业。