探索海底奥秘的英语是 "explore the mysteries of the ocean floor"。这个短语来源于人们对海洋生物和地质的好奇心，以及对海底地貌、海底地形和海底地质的探究。
下面是一些例句：
Scientists are using submersibles to explore the mysteries of the ocean floor. (科学家们正在使用潜水器探索海底奥秘。)
The ocean floor is full of mysteries that we have yet to discover. (海底充满了我们尚未发现的奥秘。)
She wanted to be an oceanographer so that she could explore the mysteries of the ocean floor. (她想成为一名海洋学家，以便探索海底奥秘。)