immutable

The belief in immutable natural laws was central to Enlightenment philosophy.对永恒不变的自然规律的信仰是启蒙运动哲学的核心。

Social hierarchies are never immutable; they shift in response to economic and political pressures.社会等级从来都不是一成不变的；它们随着经济和政治压力的变化而改变。