单词	biconditional
释义	biconditional noun bi·​con·​di·​tion·​al ˌbī-kən-ˈdish-nəl  -ˈdi-shə- : a relation between two propositions that is true only when both propositions are simultaneously true or false see Truth Table Word History First Known Use 1940, in the meaning defined above
随便看	steatorrhoeas stech steckling steddes steddle stedds stedes stedfast stedfasts Stedman steds stee steed steedless steeds steek steeked steekgras steekgrass steeking steeks steel steel band steel blue steel bronze

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