In the history of war,there are instances where defeat in a single battle nullified all the advantages of a series of victories,and there are also instances where victory in a single battle after many defeats opened up a new situation.

• 战争历史中，有在连战皆捷之后吃了一个败仗以至全功尽弃的，有在吃了许多败仗之后打了一个胜仗因而开展了新局面的。