布朗运动已经是人们熟知的现象了。从布朗(R.Brown)在1827年用显微镜观察到悬浮在水里的菌类孢子运动起,历经几十年,到20世纪初才建立起布朗运动理论。布朗运动理论的建立,充分证明了分子的存在及分子的热运动,并充分证明了统计力学预言的涨落现象确实存在。这一理论在很多方面有着广泛的应用。 Brown sports is already a well-known phenomenon. From Brown’s 1827 observation of the spores suspended in the water with a microscope, the theory of Brownian motion was established only after several decades until the beginning of the 20th century. The establishment of Brown’s motion theory fully proved the existence of molecules and the thermal movement of molecules, and fully proved that the fluctuation of statistical mechanics predictions does exist. This theory has a wide range of applications in many aspects.