A measure of the safety integrity in a given system, expressed variously as a number (e.g. 1, 2, 3, or 4) or using a descriptor (such as high or low) with these being well defined in particular situations.
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。