英语词汇“充分又必要条件”的翻译、意思、用法、释义-英汉汉英双解词典

词汇	充分又必要条件
释义	充分又必要条件 chōng fèn yòu bì yào tiáo jiàn如果有甲必有乙，无甲必无乙，那么甲就是乙的充分又必要条件。例如，三角形是等角的，则三角形是等边的，而只有三角形是等角的，三角形才是等边的。因此，三角形等角就是三角形等边的充分又必要条件。
随便看	residenza residenzs reside permanently reside permanently in paris resider residerce Resideri resides in reside tackle reside view reside with reside within residfiner residfining residfining process resid hds process resid hydrodesulfurization process resid hydroprocessing process resid hydrotreating residing re-siding Residing as visitors residing in residing prefecture without actual domains residers