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-爱贷网

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	Long peppers longperiod long period long-period long-period and broadband seismic observation long-period average flow long period Cepheid long-period change long period comet long period constituent long period cost long-period cost long period delayed neutron long-period delayed neutron long period down warping long-period dynamic stability long period earth tidal gravity long period estrus long-period event long period fading longperiod fiber grating long period fiber grating long-period fiber grating Long-period fiber grating long period fiber gratings