Read Edit View history 當且僅當 dāngqiějǐndāng if and only if Origin Definitions Defs Strokes Stroke Words Sentences Sents Senses Add sense 当且仅当/ 當且僅當 dāngqiějǐndāng if and only if Used in logic and mathematics to indicate that two statements are equivalent; when and only when Edit Delete References Add reference No references for this word.
当且仅当/ 當且僅當 dāngqiějǐndāng if and only if Used in logic and mathematics to indicate that two statements are equivalent; when and only when Edit Delete