mesothorium mesonic次钍二
mesothorium residue新钍残渣
mesothorium mud翻译;含碳酸新钍和碳酸镭的碳酸钡英语;含碳酸新钍和碳酸镭的碳酸钡
mesothorium 新钍
mesothorium II新钍
mesothorium I新钍I
mesothorium E新钍
N（名词） either of the two radioactive elements which are decay products of thorium. Mesothorium I is now called radium-228. Mesothorium II is now called actinium-228 新钍 [physics][OBSOLETE]