短語詞組短語flood storage period 蓄洪期flood inundation period 洪水淹沒期divide flood -period 洪水分期flood peak period 洪峰期dividing flood -period 洪水分期in the flood recession period 汛后pre flood period 前汛期flood and drought period 洪旱期stability in flood period 渡汛安全 返回 flood period