这一限制是内在的，属于该理论的本质。

The limit is ___intrinsic, belonging to the nature of the theory.

好奇心是人类与生俱来的特质。

Curiosity is an ___intrinsic trait of human beings.

钻石的内在价值在于它的稀有性和美丽。

The ___intrinsic value of a diamond lies in its rarity and beauty.