Words are like shadows, and shadows are like words: they say nothing, they only repeat what we want to hear.
Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.
数学不是关于数字、方程、计算或算法的：它是关于理解的。
The human body is a complex puzzle, and viruses are just one piece of it.
生活中闲言碎语在所难免，不必过分在意，做好自己即可。
Materials should be allowed to speak for themselves.