使用静态字典时，通信的两端都使用预定义的字典。
With static dictionaries, both sides of the communication use a predefined dictionary.
LZ 算法使用一个静态字典存储所需的信息。
The LZ algorithm uses a static dictionary to store the needed information.
因为您使用了NSDictionary，所以您创建了静态字典。
Since you used NSDictionary, you created a static dictionary.
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