A quantum property of the charm quark whose conservation explains the absence of certain strange - particle decay modes and that accounts for the longevity of the J particle.是什么意思_A quantum property of the charm quark whose conservation explains the absence of certain strange - particle decay modes and that accounts for the longevity of the J particle.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句