Warning: file_put_contents(/www/wwwroot/ppbbu/cp667.com/cache/070fef58073d9be2ed2d1f3327c8f7d5.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/cp667.com/index.php on line 55 beta decay英英字典_beta decay剑桥英语解释_beta decay柯林斯英文解释_淳朴汉英词典
1. N the radioactive transformation of an atomic nucleus accompanying the emission of an electron. It involves unit change of atomic number but none in mass number β衰变 (Also called beta transformation, beta process)