事实上，世界上有37种海马是鱼，它们通过鳃呼吸，用鱼鳔来控制浮力。

Indeed, the world's 37 species of seahorse are fish, breathing through gills and using a swim bladder to control their buoyancy.

youdao

事实上，这些庞然大物确实是鲨鱼。它们通过鳃呼吸，就像鱼一样。

The behemoths are indeed sharks. They breathe through gills, like fish.

youdao

事实上，这些庞然大物确实是鲨鱼。它们通过鳃呼吸，就像鱼一样。

The behemoths are indeed sharks. They breathe through gills, like fish.

youdao