一个网目录是与一个巨大的参考书图书馆类似的一些东西。
A web directory is something akin to a huge reference library.
图书馆有大量的外文参考书。
The library contains a large number of foreign language reference books.
老师还经常教我们通过到图书馆查阅参考书或做实验的方法寻求答案。
Frequently, our teachers suggested ways to find the answers by searching the reference books that were available in libraries or by actual experimentation.
应用推荐