1. Water level upstream is higher than that downstream during the ebb tide, and water level descent of ebb tide is one order bigger than that of flood tide.
落潮期间上游水位均大于下游水位，水面坡降落潮比涨潮大一个数量级；
2. But the sea ebb and flow, Big Wave Xiaolangdi stop, there is a moment when calm, and the monthly high tide and ebb of the daily sea surface height is also significantly different.
但海面潮起潮落，大浪小浪不停，可以说没有一刻风平浪静的时候，而且每月每日涨潮与落潮的海面高度也是有明显差别的。
3. We have the largest and probably the most respected scientific community in the world, yet our pre-collegiate science education is at a low ebb.
我们有着最大的，并且可能是在全球中最爱尊敬的科学区域，然而，我们的前学院的科学教育却地直处于低潮。
4. It would hopefully appear as part of the traditional ebb and flow of revolution and counterrevolution in the Caribbean.
那么它就很有希望被看作是加勒比海地区传统的革命与反革命消长的一部分。
