A measure that is sometimes used by the ecommerce industry to establish advertising rates. It represents the amount of money an advertiser pays for every thousand times a page containing an advert is viewed by the user of a browser.
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。