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.
由於水上陞和下降的瓶子的頸部，用橡皮筋，慶祝新的水平。
The water level at the Three Gorges Dam reached its planned highest mark at 9 am Tuesday, Xinhua reports.
據新華社報道，周二上午9點，長江三峽水庫首次達到最高蓄水位。
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.
城市給水系統是現代化城市最重要的基礎設施之一，是城市文明、經濟發展和現代化水平的重要標志。