其他情况下，它是未初始化或false的。

Otherwise, it is uninitialized or false.

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未初始化的实例是指从未保留的实例。

An uninitialized instance is an instance that has never been persisted.

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该区块包含未初始化的数据。

The section contains uninitialized data.

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指示此实例未初始化。

Indicates that the instance is uninitialized.

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指示此实例未初始化。

Indicates that the instance is uninitialized.

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