Warning: file_put_contents(/www/wwwroot/zidian/biehu.cn/cache/2c79948811f1481cdd0b934e7c2f0b3d.txt): failed to open stream: No space left on device in /www/wwwroot/zidian/biehu.cn/index.php on line 58 beta decay英英字典_beta decay剑桥英语解释_beta decay柯林斯英文解释_甲百匯小鸡词典
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衰變 (Also called beta transformation, beta process)