“洋底”的英语？

“洋底”的拼音为：yáng dǐ...

洋底由平坦的平原构成.The ocean bottom is made up of smooth plains.在陆地和洋底要设置许多高增益的台站.Many high - gain stations will be deployed on land and ocean bottom.我们初次潜入大西洋底时心情十分激动.Our initial Atlantic dives were filled with excitement....