addition of serie

例句：

1. 1. The new software adds a series of features to the existing system.
   新软件为现有系统增加了一系列的功能。
2. 2.The research team added a series of experiments to their study.
   研究团队在他们的研究工作中增加了一系列的实验。
3. 3. The teacher asked the students to add a series of numbers to the problem.
   老师要求学生们在问题中添加一系列数字。