我用录音机录下了老师的讲座。

I used a ___recorder to capture the teacher's lecture.

学校音乐课上，我们学习了如何演奏竖笛。

In music class, we learned how to play the ___recorder.

学校的记录员负责保管所有学生的档案。

The school ___recorder is responsible for keeping all student records.