系统性组合

例句：

1. 1. We need to develop a systematic approach to solving this problem.
   我们需要发展一个解决这个难题的系统性方法。
2. 2. The research was conducted systematically, with each step carefully documented.
   研究是系统进行的，每一步都仔细记录。
3. 3. The teacher used a systematic approach to teach the students about the new topic.
   老师用一种系统性的方法来教学生们关于新话题的内容。