congenital pit of optic disc

例句：

1. 1. The child's congenital deafness is a significant challenge for his parents.
   这个孩子的先天性耳聋对父母来说是一个巨大的挑战。
2. 2.The scientist discovered an inherent property of the material that was previously unknown.
   这位科学家发现了一种材料固有的属性，之前人们并不知道。
3. 3.The geneticist found that some species are naturally born with certain traits, which is known as congenital inheritance.
   遗传学家发现某些物种天生就具有某些特质，这被称为先天性遗传。