pinniform

例句：

1. 1. The pinniform shape of the octopus is fascinating to watch.
   章鱼的多角形形状令人着迷。
2. 2. The pinniform structure of the shell is unique and fascinating.
   贝壳的多角形结构独特且引人入胜。
3. 3. The pinniform design on the car's body makes it look more stylish.
   汽车车身的多角形设计使其看起来更时尚。