内容包括：
1．录音机是发明中最受欢迎和最普及的电器之一。
2．这种电器在许多方面都有用。
3．然而，它也能成为烦人的东西。
答案：
The tape recorder is one of the most welcome and popular electronic devices ever invented. It is not only esteemed by teachers, research workers, administrators but also by many students. They like their recorders as much as or more than their TV sets and radios and some regard them as good companions. This device is useful in many ways. It can be used in learning,teaching, sporting, and entertaining. For example, it is an essential instrument for students to learn foreign languages, for English teachers to make their classes lively and interesting and for people to enjoy their music. Besides, it can also be used in mass media. With it, journalists can record what government officials,spokesmen or interviewees say. However,it can also become a nuisance if we use it improperly. Too loud music played by the recorder causes noise pollution, thus affecting other people's rest and too loud music from walkman dama【英语翻译学习网（enfanyi.com）第一英语学习门户，提高英语能力就上英语翻译学习网】ges people's hearing. So we must make good use of the tape recorder.
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