Number two is developmental or abnormalities acquired during the formation of nasal septum.

第二是在鼻中隔形成过程中发育或出现异常。

Any abnormal pressure applied to nasal septum, results in its deviation to one side or another.

任何不正常的压力施加到鼻中隔，导致其偏侧或另一侧。

Types of DNS: 1. Anterior dislocation: The nasal septum is dislocated into one of the nasal chambers.

DNS 的类型：1. 前脱位：鼻中隔脱位进入其中一个鼻室。

They usually happen when things like dry air, smoke, or dehydration dry out some of the mucus that protects your nasal septum, that barrier that splits your nose into two nostrils.

它们通常发生在干燥空气、烟雾或脱水等因素使保护鼻中隔的粘液变干时，鼻中隔是将鼻子分成两个鼻孔的屏障。