Sustainability isn't a choice; it's our responsibility to future generations.
保持耐心,耐心等待机会。
Mathematics is not a spectator sport.
99%的时间里,真正关键的时刻就是此刻。
文字的力量可以改变世界,一次一个读者。
Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.