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1. Oxford American Dictionary

   Brownian motion

   • IPA[ˌbrounēən ˈmōSHən]

   美式

   • n.
     the erratic random movement of microscopic particles in a fluid, as a result of continuous bombardment from molecules of the surrounding medium.

   • noun: Brownian motion

2. • 更多解釋

   Brownian motion

   • IPA[ˌbraʊnɪən ˈməʊʃ(ə)n]

   英式

   • n.
     the erratic random movement of microscopic particles in a fluid, as a result of continuous ...

   Oxford Dictionary