| 1. | Our reference book proved to be insufficient .
我们的参考书显得不够。 |
| 2. | These reference books are necessary to us .
这些参考书是我们所必需的。 |
| 3. | Reference books may not be taken out of the reading room .
不得将参考书携出阅览室。 |
| 4. | The library contains a large number of foreign language reference books .
图书馆有大量的外文参考书。 |
| 5. | 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。 |
| 6. | It has many omissions ; even so , it is quite a useful reference book .
那本书有许多遗漏之处，即使如此，尚不失为一本有用的参考书。 |
| 7. | Then the need to turn to a dictionary or a reference book , perhaps ten or even twenty times a page , tires him out .
后来，每读一页需要查阅词典或参考书十次甚至二十次，这就使他疲惫不堪。 |
| 8. | From finding the right place for the latest addition to verifying facts in reference books , there is always much to do .
从为一件新添的收藏品找合适的放置地方，直到在参考书中验证资料，总有事可做。 |
| 9. | You can view the reference book online for free
你可以免费线上浏览这本参考书。 |
