“biconditional”的概念、定义、翻译、参考文献-科学参考

单词	biconditional
释义	biconditional Encyclopedia 文学特指性释 biconditional双条件式对于任何命题P、Q而言，P是Q的充分必要条件，P成立时，Q成立；Q成立时，P成立，即P等价于Q的条件式。用符号“↔”表示。又称等值式。 Mathematics biconditional双条件的；双条件联结词
随便看	Sumatran orangutan sumatran rhinoceros sum axiom sum by columns sum by diagonals sum by rows sum by squares sum chain complex sum channel sum check sum check code sum cycle sum-difference sum discrepancy test sum distribution Sumer Sumerian language Sumeru Mount Caves sumeru platform sum event sum formula sum-free set sum frequency sum frequency generation spectroelectrochemistry sum frequency generation vibrational spectroscopy

科学参考收录了854744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。