Money for which the face value of notes or coin is unrelated to the value of the material they are produced from. Money is now mostly token money if it has any physical existence at all, and consists mainly of book or computer entries.
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。