People living in different countries made different kinds of words. Today there are about fifteen hundred languages in the world. Each contains many thousands of words. A very large dictionary, for example, contains four or five hundred thousand words. But we do not need all these. To read short stories you need to know only about two thousand words. Before you leave school; you will learn only one thousand or more.
请标准翻译(不要机器翻译的),谢谢