keep a book

it is also the only way to keep a book that tries to survey the entire field to a manageable size.

这也是最理想的方法，就是使一本书按照易于控制的篇幅，概括地评述这一完整的领域。

for how long can a reader keep a book before he renews it?

续借之前一个读者可以保留书多久？一个月

I'm an avid reader and I always keep a book around for any down time I might have.

我是一名狂热的书迷，总会在手边备着一本书，只要一有空闲时间就拿出来看。

reader: how long may i keep a book?

读者：一本书可以借多久？

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

把英语书放在枕头下面提醒自己早晨起床的时候或晚上入睡前操练英语。

borrowers can keep a book for as long as they like.

借阅者想借多久都可以。