“泄洪”与“蓄洪”一字之差，却十分精准阐释了“城”与“河”，各自需要扮演的角色。对应，“不惜一切代价”中的“不惜”和“代价”。
- The difference between the words “flood discharge” and “flood storage”, is a very precise explanation of the roles that “city” and “river”, each need to play. Correspondingly, the words “at” and “costs” in “at all costs”.