slack water

1. Each time the current changes directions, a period of no current, known as slack water, intervenes.
   每当潮流改变方向时，中间都有一段叫做平潮的无潮流阶段。
2. From just the entrance, in the southern part of the bay, up to a second slack water area, about midway up the bay, tidal currents are ebbing.
   在海湾的南部，从紧靠入口处内侧直到第二平潮区，其间距离大约是到海湾的一半，潮流正在回落。
3. The vacuum slack flow, resulted from surplus energy in large downhill section of liquid pipelines, will cause water hammer, oscillation, cavitation, vapor liquid mixture, and increase the intermixture of batching transportation.
   大落差线路存在剩余能量是产生不满流的根本原因，它可能引发水击、振动、气蚀、产生气液混合物以及增大多种液体顺序输送时的混输量等一系列问题。

noun

1. the occurrence of relatively still water at the turn of the (low) tide

   Synonym:    slack tide

2. a stretch of water without current or movement
   1. suddenly they were in a slack and the water was motionless

   Synonym:    slack