短語詞組短語contrapositive rule [計(jì)]倒置槼則;對調(diào)槼則;繙譯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(dòng)機(jī)proof f by contrapositive 反証法 返回 contrapositive