| 释义 |
isotope /'aisataup; 'aisaztop/ n atom of an element, eg heavy hydrogen, having a nuclear mass different from that of other atoms of the same element although chemically identical: 同位素(同一元素中之原子，其核质最与其他原子不同而化学性质完全相同君，如氢中之 M): radio-active ~s, unstable forms used in medicine and industry. 放射同位素。 |