An empirically detectable feature of a situation which is a reliable sign of some further truth. It is sometimes contrasted with a criterion, as having only a contingent connection with the further fact of which it is a sign.
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。