Rather, a new immutable version of the data structure is returned.
而是返回该数据结构的一个新的不可变版本。
Is the tendency to perform best at a certain time of day immutable?
哈佛商业评论：一个人每天处在巅峰状态的时间是不变的吗？
But from a testing perspective, a big problem is that they are often immutable.
但是从测试的角度看，最大的问题是它们通常是不可更改的。
Like its global cousin, a class constant is immutable once defined.
与全局属性一样，类常量一旦定义就不可更改。
Often a variable is only assigned to once and is used as an (immutable) definition.
通常对变量的赋值只有一次，并被当作不变的对象。
Another useful method is the freeze method by which a string can be made immutable.
另一个有用的方法是freeze，该方法可以使字符串变得不可修改。
Mother love, is a human being eternally immutable subject.
母爱，是人类一个亘古不变的主题。
A context item is an immutable object and contains state.
上下文项是不可变的对象，并包含状态。
A context item is an immutable object and contains state.
上下文项是不可变的对象，并包含状态。
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