flood prevention system

• 防洪系统

flood prevention system的用法和样例：

例句

1. 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。