series of concept

例句：

1. 1. The film stars a series of actors.
   这部电影由一系列演员主演。
2. 2. He has a series of hobbies.
   他有一系列爱好。
3. 3. This is a series of problems that need to be solved urgently.
   这是一系列需要紧急解决的问题。