上游元通大警 SHANGHAI JIAO TONG UNIVERSITY 科学是什么？对科学的定义与划界 几个典型代表： 开尔文：能量化、能精确测量的才算科学 "When you can measure what you are speaking about and express it in numbers,you know something about it; but,when you cannot measure it,when you cannot express it in numbers,your knowledge is of a meager and unsatisfactory kind;it may be the beginning of knowledge,but you have scarcely in your thoughts advanced to the stage of science."-Scottish scientist, Lord Kelvin.科学是什么？对科学的定义与划界 几个典型代表： 开尔文：能量化、能精确测量的才算科学 “When you can measure what you are speaking about and express it in numbers, you know something about it; but, when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meager and unsatisfactory kind; it may be the beginning of knowledge, but you have scarcely in your thoughts advanced to the stage of science.” －Scottish scientist, Lord Kelvin