| 词汇 | the Fundamental Counting Principle | 
| 释义 | the Fundamental Counting Principle  noun [ S ] uk/ˌfʌn.də.men.təl ˈkaʊn.tɪŋ ˌprɪn.sə.pəl/ us/ˌfʌn.də.men.t̬əl ˈkaʊn.t̬ɪŋ ˌprɪn.sə.pəl/  基本计数原理 the rule that says that if there are x ways in which one thing can be done, and y ways in which another thing can then be done, then there are x × y ways in which the two things can be done one after the other | 
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