Immutable Value常量值
Eternally Immutable亘古不变
immutable types不可变类型
Immutable infrastructure不可变基础设施
Immutable Data不可变数据
Immutable Collection不可变集合;任何修改会返回新的
immutable bit变字节
immutable deployment不可变部署
ADJ（形容词） Something that is immutable will never change or cannot be changed. 永恒的; 永远不变的 [正式]
...the eternal and immutable principles of right and wrong.
...这些永恒不变的对与错的原则。