词汇	theory of chances
释义	theory of chances 概率论
随便看	directional duality principle directional duration immunization directional dynamics directional earth leakage relay directional earth-leakage relay directional echo sounding directional echo-sounding directional effect directional element directional elements directional emissivity directional emittance directional emitter directional energy gain directional enrollment directional entropy directional error Directional errors directionalet directional etching directional-eutectoid directional evacuation directional exit sig directional exit sign directional explosion