短語詞組短語contrapositive rule [計]倒置規(guī)則;對調(diào)規(guī)則;翻譯contrapositive form [自]換位形式contrapositive law 假言易位contrapositive sentence 換質(zhì)位The contrapositive 逆反命題contrapositive symmetry 逆否對稱性contrapositive contraposition proposition 逆否命題contrapositive cam engine 對置式凸輪發(fā)動機proof f by contrapositive 反證法 返回 contrapositive