Term used by Russell to describe definite descriptions and other expressions which have the feature that they cannot be defined in isolation, but only by means of giving an analysis of any entire sentence in which they are embedded.
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。