海洋，作为五十万种海洋生物的家园，有着许多激动人心的奥秘。

The sea, home of 500,000 species of Marine animals, has many mysteries that excite them.

youdao

海洋，作为五十万种海洋生物的家园，有着许多激动人心的奥秘。

The sea, home of 500,000 species of Marine animals, has many mysteries that excite them.

youdao