While OCLC, RLIN, WLN came to be known as bibliographic utilities, two other types of library services began to be developed in the late 1970s.是什么意思_While OCLC, RLIN, WLN came to be known as bibliographic utilities, two other types of library services began to be developed in the late 1970s.在线翻译_英语_读音_用法_例句