How long can I keep a book?

一本书能借多长时间？

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How long may I keep a book?

一本书可以借多久？

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Keep a book under your pillow to remind yourself to practice first thing in the morning and before you go to sleep at night.

在枕头底下放一本书以便提醒自己每天早晨起床和晚上睡觉之前的第一件就是练习。

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Sometimes he did not even keep a copy of his book.

VOA: special.2010.01.10

The duke was said to keep a book of prayers in his jacket.

ECONOMIST: Duke of Norfolk

Borrowers can keep a book for as long as they like, but when they borrow a new title, the previously borrowed book automatically disappears from their device.

FORBES: Amazon Giving Free Books To Kindle Users, Apple Battle Heats Up

In practice, they accept special offers to members of a loyalty club, or to people who book tickets early or keep a big balance on an account.

ECONOMIST: Managing customers