短語(yǔ)詞組短語(yǔ)flood alleviation 緩洪alleviation e 減輕collisiona alleviation 碰撞弛豫inverse alleviation 反弛豫earthquake alleviation 減震alleviation efficiency 防治alleviation effect 緩解效應(yīng)cavitation alleviation 減蝕transverse alleviation 橫向弛豫poverty alleviation 扶貧 返回 alleviation