| 释义 |
J particlen.（名词）- 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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