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单词 J particle
释义 J particlen.(名词)
  1. A neutral meson having an unusually large mass (about 6,060 times the mass of an electron) and a long lifetime (about 10-20 second). Also called psi particle See table at subatomic particle J粒子:一种中性介子,质量异常大(约为电子质量的6,060倍),寿命长(约为10-20秒) 也作 psi particle 参见 subatomic particle
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