The quality of being changeable; mutability.
变化无常作为可变化的性质；
This effect is known as a problem of mutability of the boxed value types.
代码的作者有必要传播可能的改动会影响到值类型的已装箱实例。
There are some class immutable is impossible, then try to limit the mutability of them.
而总有些类显然不可能是不变类的，这时也要尽可能的限制它的可变性。
There are some class immutable is impossible, then try to limit the mutability of them.
而总有些类显然不可能是不变类的，这时也要尽可能的限制它的可变性。
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