Plus, it has two instance documents that you'll need to manage separately.
此外，它有两个实例文档需要分别管理。
Valid instance documents for the same message look strikingly similar to each other.
同一消息的有效实例文档看起来都惊人地相似。
Valid instance documents for the same message look strikingly similar to each other.
同一消息的有效实例文档看起来都惊人地相似。
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