Nonequivalence
非等价, 反重合运算, “异”运算
🗣️ 情景例句
Window-shopping is some girls'favorite pastime.
逛街是许多女孩消磨时间的首选方式。
A clear conscience is a soft pillow.
问心无愧，高枕无忧。
Past experience has taught us that certain accomplishments are beyond attainment.
以往的经验告诉我们有些事是办不到的。