contrapositives

美 　英

• adj.對(duì)照的；針對(duì)的
• 網(wǎng)絡(luò)對(duì)換句；逆反命題；命題的否證

詞形變化

復(fù)數(shù)：contrapositives  

英漢解釋

adj.	1. 對(duì)照的;針對(duì)的

英英解釋

n.	1. in logic, a conditional proposition that negates another conditional proposition and also reverses its clauses.