记转器

例句：

1. 1.The engineer used a recorder to capture the sound of the explosion.
   工程师使用录音机捕捉爆炸声。
2. 2. The teacher asked the students to record their answers in writing.
   老师要求学生们用书面形式记录他们的答案。
3. 3.The scientist used a recorder to document the progress of the experiment.
   科学家使用录音器记录实验的进展。