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英语翻译there have not always been pencils and pens,rulers and b

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英语翻译
there have not always been pencils and pens,rulers and books.
there have been many thousands of inventions,large or small,in the history.some of these inventions have changed the world,such as paper,printing and radio.and we know the inventions.but we have forgotten most of the other inventors.who invented the clock,for example,or the lock to the door?
there have been thousands of inventors and we should be thankful to them.
并不是从最开始就有铅笔、钢笔、尺子和书本的.
在历史上有或大或小的许多发明创造.其中一些改变了我们的生活,例如纸张、印刷和收音机.我们知道这些发明,但是我们忘记了大部分的发明家,例如谁发明了钟,或是谁发明了门锁.
我们应该感谢那许多的发明家们.