The contrapositive is true, too.
对换一下也是正确的。
The contrapositive is equally true.
这个反命题同样是正确的。
While according to the statistical data, the experimental group has more higher trend than contrapositive group in efficient respects of all medical standards.
但根据数据的统计观察，在各项疗效判定标准的总的有效率方面，试验组有高于对照组的趋势。
As we know, contrapositive symmetry is the tautology in classical logic.
众所周知，在古典逻辑中，逆否对称性是永真公式。
As we know, contrapositive symmetry is the tautology in classical logic.
众所周知，在古典逻辑中，逆否对称性是永真公式。
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