蓄电池水位相当低了，需要加些蒸馏水。 The battery's quite low, and needs some distilled water.
水闸用门关住的水道的一部分，如运河。其中通过升高或降低这部分的水位可以抬升或压低运输中的船只 A section of a waterway, such as a canal, closed off with gates, in which vessels in transit are raised or lowered by raising or lowering the water level of that section.
磨坊水坝横跨溪流建造的堤坝，以提高水位使溢满的水有足够的动力转动磨坊的水轮 A dam constructed across a stream to raise the water level so that the overflow will have sufficient power to turn a mill wheel.
