老师让学生们逐个列举出科学实验的步骤。

The teacher asked students to ___enumerate each step of the science experiment.

老师让学生们系统地列举图书馆的书籍。

The teacher asked the students to ___enumerate the books in the library systematically.

老师在课堂上逐一列举了考试的重点内容。

The teacher ___enumerated the key points for the exam one by one.