A list of email addresses maintained by a user that the user believes are not addresses of known spammers. Sometimes the term is used to describe a list of users of a system who can access some or all of a system.
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。