数学不是关于数字、方程、计算或算法的:它是关于理解的。
The real moral test of a society is how it treats those who are at the dawn of life, the children; those who are in the twilight of life, the aged; and those who are in the shadow of life, the sick, the needy and the handicapped.
水产养殖中最危险的一句话是"我们一直都是这么做的"。
"Every man is a piece of the continent, a part of the main."