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德雷克方程是什么？What is the Drake equation?

德雷克方程是用于估算银河系中可能与我们通讯的外星文明数量的一个数学方程。它由天文学家弗兰克·德雷克提出，包含了一系列与恒星形成率、恒星拥有行星的比例、行星能够支持生命存在的比例、生命进化为智慧生命的概率、智慧生命能够发展出通讯技术的概率以及这些文明存在的时间长度等因素相关的变量。通过综合考虑这些因素，来推测可能存在的外星文明数量。The Drake Equation is a mathematical equation used to estimate the number of extraterrestrial civilizations in the Milky Way that might be capable of communicating with us. It was proposed by astronomer Frank Drake and contains a series of variables related to factors such as the star formation rate, the proportion of stars with planets, the proportion of planets that can support life, the probability of life evolving into intelligent life, the probability of intelligent life developing communication technology, and the length of time these civilizations exist. By comprehensively considering these factors, the possible number of extraterrestrial civilizations is inferred.