“secondary cosmic ray”的概念、定义、翻译、参考文献-科学参考

单词	secondary cosmic ray
释义	secondary cosmic ray Astronomy One of the shower of atomic particles produced when a primary cosmic ray enters the Earth’s atmosphere. The interaction first produces pions, which subsequently decay rapidly into muons, some of which may also decay into electrons. The bulk of the secondary cosmic rays present at sea level are muons. See also cosmic-ray shower.
随便看	half-normal plot halfplane half-power beamwidth half-power point half-replicate half sandwich half-shadow test half-space half-space depth half-spreading rate half subtractor halfsurface half-thickness halftone half-wave dipole half-wave plate half-wave rectifier half-wave rectifier circuit half-wave voltage doubler half-width half-width at half-maximum half word half‐angle formula half‐closed half‐life

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