Take chemistry for example. The scientist always uses symbols to represent elements (元素). He uses the first letter of the name,capitalized,as the symbol. For example,the symbol for hydrogen (氢) is H,for oxygen (氧)is O,for nitrogen(氮) is N. With such symbols,he can form the ...
People can remember what they have seen or experienced because they attach a word symbol to them. During the long record of our efforts to gain more and more knowledge about the face of the earth as the human habitat, there has been a continuing interplay between things and events. The ...