基本粒子自己“决定”自旋方式，宇宙射线自己决定何时衰变。
An elemental particle "decides" which way to spin. A cosmic ray decides when to decay.
依据宇宙射线留下的轨迹，霍夫曼采用了各种测量办法努力鉴别这些宇宙射线衰变创造的基本粒子。
Hoffmann undertook various measurements and attempted to identify the elementary particles created when the cosmic rays decayed, based on the tracks they left.
依据宇宙射线留下的轨迹，霍夫曼采用了各种测量办法努力鉴别这些宇宙射线衰变创造的基本粒子。
Hoffmann undertook various measurements and attempted to identify the elementary particles created when the cosmic rays decayed, based on the tracks they left.
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