In logic, a rule entitling one to transform an expression of one form into that of another. The transformation of ¬(p & q) into ¬p ∨ ¬q is an example of De Morgan’s laws.
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。