When tides drag the ocean over a shallow barrier such as a ridge on the ocean floor, it creates waves in the lower, denser layer of water.
当潮汐经过像洋盆上的山脊等浅层障碍时，就会在低层密度大的水体里造成波浪。
2
The local aeolian geomorphic unit is chiefly some small-scale deflation shallow valley deflation relic hillock, dune and soil hillock etc. that generate facing wind slope on ridge-mound and in hollow.