短语词组短語declivity ofways 下水滑道傾斜度declivity displacement 傾斜偏移量declivity observation [測]傾斜觀測;傾斜觀測declivity bury 斜坡軟粘土declivity ratio 傾斜率berth declivity 船台斜度;船台傾斜度 返回 declivity