isolated dienes

例句：

1. 1. The isolation of the new drug hasbeen a major breakthrough in medical research.
   新药的分离是医学研究的一大突破。
2. 2.The isolation process involves isolating the desiredcompound from a complex mixture.
   分离过程涉及从复杂混合物中分离出所需化合物。
3. 3. Theisolation of the rare earth elements is crucialfor the development of new technologies.
   稀有元素分离对于开发新技术至关重要。