Popular Science on Flood Control丨How to distinguish between “red, orange, yellow and green”? Understand the rainstorm warning signals in one picture

Popular Science on Flood Control丨How to distinguish between “red, orange, yellow and green”? Understand the rainstorm warning signals in one picture

Popular Science on Flood Control丨How to distinguish between “red, orange, yellow and green”? Understand the rainstorm warning signals in one picture

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