在入站消息处理的开始阶段，系统可用性指示器被设置为“true”，表示端点系统是可用的。

At the start of inbound message processing, the system availability indicator is set to "true", indicating that the endpoint system is available.

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在入站消息处理的开始阶段，系统可用性指示器被设置为true，表示端点系统可用。

At the start of inbound message processing, the system availability indicator is set to true to indicate that the endpoint system is available.

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举例来说，您可以在开始另一个演进的初始阶段的同时处理一个演进的构建阶段。

For example, you can work on the Construction phase of one evolution while beginning the Inception phase of another.

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