单词deep floor
un.: 加强肋板网络: 深肋板；高肋板；顶板加强肋
加强肋板
While the sea floor has had significant study, he points out little exploration has been done on this water above the deep floor.
他指出尽管对海床有丰富的研究，但针对海床上的水却甚少探索。