isokite

例句：

1. 1. The scientists are studying the isotopes of uranium to find a new source of energy.
   科学家们正在研究铀的同位素以寻找新的能源来源。
2. 2. The isotopes of carbon and nitrogen play important roles in photosynthesis.
   碳和氮的同位素在光合作用中起着重要作用。
3. 3.The isotopes of gold have been used as currency for centuries.
   金的同位素几千年来一直被用作货币。