First, think about the question before you use reference books.
首先，在使用参考书之前先思考问题。
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。
We should train them to make use of reference books.
我们应训练他们学会使用参考书。
This experience tells him that he should make good use of reference books.
这次经验告诉他，他应当好好利用参考书。
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。
Therefore, we should make use of reference books properly.
因此，我们应该正确使用参考书。
We also train them to make use of reference books.
我们还培养他们使用参考书。
You must learn how to use dictionary and reference-books.
你们要学会使用词典和工具书。
We can make free use of the reference books in our library.
我们可以自由使用图书馆的参考书。
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。
We can make free use of the reference books in our library.
图书馆允许我们自由使用参考书。
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。
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。
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