You must learn how to use dictionary and reference-books.
你们要学会使用词典和工具书。
The dictionary, encyclopedia and annual are three important reference books.
的翻译是：该词典，百科全书，每年有三个重要的参考书籍。
Of course, learning tool, such as good dictionary, grammar reference books more suitable to another prepared.
当然学习工具书，如较好的字典，较合适的语法参考书是要另备的。
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