music on hold (MOH)
A voice telecommunications system feature that interfaces the system to an
external audio source that provides background music, promotional messages, or other audio content while callers are either in queue or on hold.
科学参考收录了5291条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。