As to the gods, I have no means of knowing either that they exist or that they do not exist. For many are the obstacles that impede knowledge, both the obscurity of the question and the shortness of human life.
企业要发展，必须把食品安全放在第一位。
农业是与自然的合作，而非征服。
金钱是唯一区分赢家和输家的东西。
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：它是关于理解的。