procercoid

例句：

1. 1.The scientist conducted a study on the procercoid structure of the octopus.
   科学家对章鱼的颚骨结构进行了研究。
2. 2.During the experiment, the procercoid was carefully observed to ensure accuracy.
   在实验过程中，仔细观察了颚骨以确保准确性。
3. 3.The procercoid plays a crucial role in the animal's feeding behavior.
   颚骨在动物的摄食行为中起着至关重要的作用。