flood prevention system是什么意思 flood prevention system怎么读
flood prevention system的相关资料
flood prevention system的用法和样例
- The system of dikes and canals, lionized by China as the world's oldest functioning flood-control system, remains a marvel of ancient engineering.
这个防洪灌溉系统被国人视作，同时也是世界最古老的机能防洪系统，现存的一个奇迹般的古老工程。
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