cartilaginous fin ray

例句：

1. 1. The shark has a cartilaginous fin ray that allows it to glide through the water with ease.
   鲨鱼拥有一条软骨鱼鳍，这使得它在水中轻松滑行。
2. 2.In some species of fish, the cartilaginous fin ray is used for propulsion and swimming.
   在一些鱼类中，软骨鱼鳍用于推进和游泳。
3. 3. The cartilaginous fin ray is a unique adaptation that allows these fish to swim efficiently in their environment.
   软骨鱼鳍是一种独特的适应机制，使这些鱼类能够在其环境中高效游泳。