英语词汇pion的读音、翻译及短语词组释义-英汉双解词典-求索网

单词	pion
释义	pion【化】 π介子 pion pi.on AHD: [pº“¼n”] D.J. [6pa!7Kn]K.K. [6pa!7$n]n.Physics （名词）【物理学】 A semistable meson produced either in a neutral form with a mass 264 times that of an electron and a mean lifetime of 8.4 × 10&9{-17} second or in a positively charged form with a mass 273 times that of an electron and a mean lifetime of 2.6 × 10 &9{-8} second. Also called pi meson See table at subatomic particle π介子：一种半稳定介子，或者以一种质量比电子重264倍的中性形式生成，其平均寿命期为8.4×10&9{-17}秒；或者以一种质量比电子重273倍的正电极形式生成，其平均寿命期为2.6×10 &9{-8}秒也作 pi meson参见 subatomic particle语源:Contraction of pi meson pi meson的缩写
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