內(nèi)容包括：

1．錄音機是發(fā)明中最受歡迎和最普及的電器之一。

2．這種電器在許多方面都有用。

3．然而，它也能成為煩人的東西。  

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 damages people's hearing. So we must make good use of the tape recorder.