weir level

例句：

1. 1.The company's new policy has raised the water usage level by 20%.
   公司的新政策提高了用水水平20%。
2. 2.The engineer needs to check the water level before starting work.
   工程师需要在开始工作前检查水位。
3. 3. The reservoir is at a critical level of water, and we need to take immediate action.
   水库的水量处于临界状态，我们需要立即采取行动。