Learners, therefore, must have books, and the right type of book, for the satisfaction of their need.

因此，为了满足他们的需要，学习者必须有书，而且是适合自己的书。

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Printing with moveable type on paper dramatically reduced the cost of producing a book compared with the old-fashioned ones handwritten on vellum, which comes from sheepskin.

羊皮纸是用羊皮制作的，与在羊皮纸上手写的老式方法相比，在纸上进行活字印刷大大降低了生产书籍的成本。

youdao

Printing with a moveable type on paper dramatically reduced the cost of producing a book compared with the old-fashioned ones handwritten on vellum, which comes from sheepskin.

羊皮纸是用羊皮制作的，与在羊皮纸上手写的传统方法相比，在纸上进行活字印刷大大降低了生产书籍的成本。

youdao

They can type in the name of the book or the International Standard Book Number or if using an iPhone, search using just a picture of the ISBN number.

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The Peter Principle sold over 1m copies, a remarkable feat for a book of its type at the time, and it spent no less than 33 weeks on the American bestsellers' list.

ECONOMIST: Guru

The type would then be inked and used to print the pages of a book.

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