water level mark

基本解释

As the water rises and falls in the neck of the bottle, use the rubber band to mark the new level.
由于水上升和下降的瓶子的颈部，用橡皮筋，庆祝新的水平。
The water level at the Three Gorges Dam reached its planned highest mark at 9 am Tuesday, Xinhua reports.
据新华社报道，周二上午9点，长江三峡水库首次达到最高蓄水位。
www.china.org.cn
Urban water supply system is one part of important fundamental facilities of model city. And it is a mark of civilization and economy and modernization level.
城市给水系统是现代化城市最重要的基础设施之一，是城市文明、经济发展和现代化水平的重要标志。