| 释义 |
镭léi金属元素,符号Ra(radium)。银白色,质软,有放射性。用来治疗恶性肿瘤,镭盐和铍粉的混合制剂可制成中子源。{radium (Ra); soft, silver-white, radioactive metallic element which is used in the preparation of a mixture of radium salt and beryllium powder in neutron sources and in the treatment of cancer and other diseases} |