A system that has been developed from the early text-based multiuser adventure games, and offers a purely text-based environment allowing multiple users to establish virtual circuits and interact with other users and with end-user systems.
科学参考收录了60776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。