invagination

例句：

1. 1. The internal folds of the leaf create a unique pattern.
   叶子内部的褶皱创造了独特的图案。
2. 2.The scientist found evidence that the organism was capable of self-invagination.
   科学家发现了证据表明该生物体能够自我内陷。
3. 3. The octopus can perform complex maneuvers by using its tentacles to create internal folds.
   章鱼可以通过使用其触手来创造内部褶皱来进行复杂的动作。