单词	cascade shower
释义	cascade shower noun : a cosmic-ray shower in which a high-energy electron produces one or more photons that convert into electrons and positrons by pair production, these secondary electrons producing the same effect as the primary, the shower thus building up until the level of energy becomes so low that photon emission cannot occur Word History First Known Use 1938, in the meaning defined above
随便看	hurray hurrayed hurraying hurrays Hurri Hurria Hurrian hurrians hurricane hurricane bird hurricane deck hurricane glass hurricane globe hurricane lamp hurricane lantern Korean dogwood korean euodia Korean evodia Korean lawn grass Korean lespedeza Korean pine Korean velvet grass koreaner koreanest commas

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