A password that is very difficult to break. For example, a long password that contains upper- and lower-case letters, digits, and characters such as $ and & will be very difficult to break.
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。