No reference books are to be taken out of the reading room without permission.
本阅览室参考书不得私自携出。
These reference books are necessary to us.
这些参考书是我们所必需的。
The library contains a large number of foreign language reference books.
图书馆有大量的外文参考书。
Whose are these reference books?
这些参考书是谁的？
They must have some training in the use of reference books.
应当对他们在使用参考书方面进行些训练。
Do you need any reference books?
你需要一些参考书吗？
Do you need any reference books?
你需要什么参考书吗？
Did you find the reference books about it?
你找到有关的参考书了吗？
All the reference books available are out of date.
所有找到的参考书都是过时的。
We also train them to make use of reference books.
我们还培养他们使用参考书。
These reference books are necessary to scientists.
这些参考书是科学工作者所必需的。
He burrowed into reference books for research data.
他查阅[钻研]参考书籍寻求研究资料。
We should train them to make use of reference books.
我们应训练他们学会使用参考书。
We should train them to make use of reference books.
我们应该在使用参考书方面对他们进行培训。
I will lend you what few reference books I can spare.
我愿把我虽然为数不多的参考书全部借给你。
The library allowed us the run of the reference books.
图书馆允许我们自由使用参考书。
I keep my reference books near my desk for convenience.
为了图方便，我把参考书放在书桌前。
The information is culled from various reference books.
这份资料是从各种参考书中摘出的。
I keep my reference books near my desk for convenience.
我把参考书放在我桌子附近是为了方便。
Have you read any reference books to guide you to write?
你在写这些东西时，有没有去看一些参考书来指导自己？
He has a large number of reference books at his disposal.
他有大量的参考书可供使用。
Only in this way can we make full use of reference books.
只有这样，才能使参考书得到充分的利用。
Therefore, we should make use of reference books properly.
因此，我们应该正确使用参考书。
These reference books are necessary to scientific workers.
这些参考书是科学工作者所必需的。
These reference books are necessary to scientific workers.
这些参考书是科学工作者所必需的。
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