1. This simple experiment was not undoing the clock; it was undoing civilization. 这个简陋的实验并非在逆转时钟，而是在逆转文明。
2. In the options market, undoing a conversion or a reversal to restore the option buyer's original position. 在期权市场中取消一个兑换或做一个逆转恢复到期权购买者初始的位置。
3. Ultimately it was the shame and degradation that the slave traffic brought to those involved, perpetrators as well as victims, that proved its undoing. 最终正是（隶贸易带来的）耻感与堕落感令牵扯其中的人-管是犯罪者还是受害者-意识到了应该废除之。
