low-water r mark低潮线低水位线
low-water mark of ordinary tide普通潮低潮标志
low-water mark of medium tide中潮低水位标志
be at low-water mark手头拮据
low water-mark低水准;翻译
N（名词） the level reached by seawater at low tide or by other stretches of water at their lowest level 低潮水位