Brownian motionyoudaoicibaDictYouDict[Brownian motion 词源字典]
"The erratic random movement of microscopic particles in a fluid, as a result of continuous bombardment from molecules of the surrounding medium", Late 19th century: named after Robert Brown (1773–1858), the Scottish botanist who first observed the motion.[Brownian motion etymology, Brownian motion origin, 英语词源]