单词	contrapositive
释义	contrapositive noun con·​tra·​pos·​i·​tive ˌkän-trə-ˈpä-zə-tiv  -ˈpäz-tiv : a proposition or theorem formed by contradicting both the subject and predicate or both the hypothesis and conclusion of a given proposition or theorem and interchanging them "if not-B then not-A " is the contrapositive of "if A then B " Word History First Known Use 1870, in the meaning defined above
随便看	heresies heresimach heresiographers heresiographies heresiography junkman junkmen junks junky junkyard junkyards Juno Juno's bird junoes Junoesque junonia junos Junot junr junt junta juntas junto juntos Junín

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