Any check that some entity respects the constraints applying to that entity. For example, when the value of a data item is input by a program, a validity check is normally performed to ensure that this value is within the acceptable range.
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。