downburstWiktionary 原文英美构词拆解downdown-前缀burstburst词干down-Decrease. · Lower position or direction, literally or figuratively.词源说明From down- + burst, coined by American meteorologist Horace R. Byers and Japanese and American meteorologist Tetsuya T. Fujita in November 1975.释义名词noun1(meteorology) A powerful downward air current, especially one during a thunderstorm, often creating powerful divergent horizontal winds and strong wind shear upon impacting the surface.