series pyrolysis

例句：

1. 1. The book has a series of chapters that are easy to follow.
   这本书有一系列章节，很容易跟随。
2. 2. They have a series of goals they want to achieve.
   他们有一个系列的目标，想要实现。
3. 3.The scientist conducted a series of experiments to test the hypothesis.
   科学家进行了一系列的实验来测试这个假设。