数学不仅仅是关于数字、方程、计算或算法:它是关于理解的。
Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.
Coal will remain a vital energy source, but only if we evolve with the times.
记着,希望是件好东西,没准儿是件最好的东西,而且从没有一样好东西会消逝!
The best way to refactor a program is to refactor it.