1. Because this cannot be undone, you may want to save a version of this file with a new name. 因为此操作不能撤消，您可能需要用新名称保存此文件的一个版本。
2. Any large or controversial measures can be undone when the new administration arrives in January. 在一月新政府入主的时候，任何大型或争议的措施都可以被取消。
3. At present our houses are cluttered and defiled with it, and a good housewife would sweep out the greater part into the dust hole, and not leave her morning's work undone. 目前，我们的房屋正堆满了家具，都给家具弄脏了呢，一位好主妇宁愿把大部分家具扫入垃圾坑，也不愿让早上的工作放着不干。
