series of similar experiments

例句：

1. 1. The series of books is a good introduction to the subject.
   这一系列书籍是对该主题的良好介绍。
2. 2. She has a series of questions about the new policy.
   她对新政策有一系列问题。
3. 3. The team worked on a series of projects over the summer.
   这个团队在夏天完成了一系列的项目。