tidal ellipse造句

the semi-diurnal tidal ellipse showed three rectilinear regions that located in the middle of the yellow sea, the bohai strait and the liaodong bay
半日潮流在黄海中部、渤海海峡和辽东湾存在三个往复流区。
It's difficult to find tidal ellipse in a sentence. 用tidal ellipse造句挺难的