directory of importers and exporters

例句：

1. 1. The library has a directory of all its books.
   图书馆有所有书籍的目录。
2. 2. He found the directory on the desk and started to look through it.
   他在书桌上找到了目录，开始看了起来。
3. 3.She asked the librarian for a copy of the directory.
   她向图书管理员要了一本目录。