而这时阀内有一个停止块来防止阀瓣超过上死点而打开。
But this time there is a stop block valve to prevent valve flap over top dead center and open.
一旦存档检查点在 RSS 节点中完成操作，它会停止应用任何其他的日志记录，让服务器保持正确状态，以便使用外部实用工具复制数据块。
Once the archive checkpoint is completed in the RSS node, it will stop applying any other further log records, leaving the server in the correct state to copy the chunks by an external utility.
CDATA是XML命令，它告诉查看程序停止解析代码，并读取接下来的块中的代码，这里的代码是字符数据的形式。
CDATA is the XML command that tells the viewer to stop parsing the code and read the code within the block that follows as character data.
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