单词：down quarks
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单词：down quarks 相关文章
Although quarks are much too small to have color or taste or any other physical characteristics we would recognize, they became clumped into six categoriesup, down, strange, charm, top, and bottomwhich physicists oddly refer to as their flavors, and
发表于:2019-02-17 / 阅读(24) / 评论(0)
万物简史
万物简史
The charged pion and antipion decay respectively into a muon plus antineutrino and an antimuon plus neutrino with an average lifetime of 2.603 x 10-8 seconds, the neutral pion decays into two photons with an average lifetime of about 0.8 x 10-16 seco
发表于:2019-02-17 / 阅读(39) / 评论(0)
万物简史
万物简史