如果当关键字在集合中时它的散列代码被更改，那么将产生一些不可预测和容易混淆的结果。

If a key's hash code were to change while it was in a collection, some unpredictable and confusing consequences could follow.

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文法的程序规则返回散列引用，其中包含作为文本的代码、注释和字符串。

The grammar's program rule returns a hash reference with the code, comments, and strings available inside it as text.

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消息摘要（又称消息认证代码）是用散列函数计算的。

The message digest (also called the message authentication code) is computed using a hash function.

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