professional library

• 专业图书馆

professional library的用法和样例：

例句

1. In a typical university or professional library, customers are not allowed into the stacks.
   在典型的大学或者专业图书馆，读者是不允许进入书库的。
2. Wireless LAN is available throughout, and professional librarians are ready to offer assistance to users.
   馆内有专业图书馆员为使用者提供协助。