短語(yǔ)詞組短語(yǔ)flood control and sedimentation alleviation 防洪減淤flood prevention and disaster alleviation 防洪減災(zāi)flood control and disaster alleviation 防洪減災(zāi)prevention and alleviation of flood 防災(zāi)減災(zāi) 返回 flood alleviation