isourea

例句：

1. 1. The scientist used isourea to study the properties of matter.
   科学家使用同位素研究物质的性质。
2. 2. The isourea samples were analyzed to determine their composition.
   对同位素样本进行分析以确定其组成。
3. 3. The discovery of isourea led to a new understanding of radioactive decay.
   发现同位素导致对放射性衰变有了新的认识。