一成不变: immutable and frozen; be immutable; be set in one's ways; changeless; cut and dried; fixed and unchangeable; go into a rut; hard and fast (formula etc,); inflexible; invariable; monotonous
东西: 东西1.(泛指示各种具体的或抽象的事物、 物体) thing 短语和例子有生命的东西 living things; 病人两天没有吃东西了。 the patient hasn't eaten anything for two days. 他买东西去了。 he is out doing some shopping. 一成不变的东西是没有的。 nothing is immutab
