Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.
数学不仅仅是关于数字、方程、计算或算法:它是关于理解的。
True scientific progress requires both creativity and discipline.
The highest activity a human being can attain is learning for understanding because to understand is to be free.
It is now clear that the hybrids form seeds which have the one or the other of the two differentiating characters.
可持续农业不是口号,而是责任,我们要为子孙后代留下绿水青山。