Oxford also has extensive online collections including databases, electronic books, reference works, as well as e-journals.

牛津大学还有丰富的网络馆藏，包括数据库、电子书籍、参考工具书，以及电子杂志。

So you need your dictionary, you need your grammar reference book, and you're understanding what it means.

你需要用到字典，你需要用到语法参考书，你要理解它的意思。

For grammar, they have a reference book with exercises and they go from unit one down to unit 100.

至于语法，他们有一本带练习的参考书，从第一单元到学到第 100 单元。

He went back to the Yard and consulted a reference book.

他回到院子里，查阅了一本参考书。