rough swell

例句：

1. 1. The storm caused a rough swell in the sea.
   暴风雨引起了海面的大浪。
2. 2. The ship was caught in a rough swell and had to turn back.
   船只被巨浪困住，不得不返回。
3. 3. The rough swell made it difficult for the swimmer to keep his balance.
   巨浪使得游泳者难以保持平衡。