他们出版参考书。
He works for a company that publishes reference books.
他在一家工具书出版公司工作。
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。
Formal language is the kind of language you find in textbooks, reference books and in business letters.
正式语体是你在教科书、参考书和商务信函中看到的用语。
These reference books are necessary to us.
这些参考书是我们所必需的。
Reference books may not be taken out of the reading room.
不得将参考书携出阅览室。
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？
Tony used no reference books in class.
托尼上课时不使用参考书。
Tony used no reference books in class.
托尼上课时不应用参考书。
Did you find the reference books about it?
你找到有关的参考书了吗？
Tony does not use reference books in class.
托尼上课时不使用参考书。
What he wants are reference books on economy.
他所需要的是经济方面的参考书。
These reference books will answer to our needs.
这些参考书符合我们的需要。
All the reference books available are out of date.
所有找到的参考书都是过时的。
The reference books were misarranged on the shelf.
这些叁考书在书架上排得不当。
We should train them to make use of reference books.
我们应训练他们学会使用参考书。
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.
我把参考书放在书桌旁用著方便。
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。
This time, use your reference books when (it is) necessary.
如果这次有必要，你可以使用参考书。
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。
I prefer the preferable preference you referred to in the reference books.
我更喜好你在参考书中提到的那个更可取的优先权。
What reference books do you recommend us to read to improve their English?
你推荐我们读些什么参考书来提高英语？
What reference books do you recommend us to read to improve their English?
你推荐我们读些什么参考书来提高英语？
应用推荐