w*******r 发帖数: 7276 | 1 So what? Is there any use? No. People build Dam to defend against the flood
for the downstream, not for the Dam itself to stand thousands years. If the
Dam can't defend the flood, even if it can exist for millions of years, what
is the usage for the Dam?
Is there any purpose for Great Wall now? No. The only purpose is for tourism
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