如果服务器端没有事件发生，而发生了超时，服务器端就会请求客户端进行异步重新连接。
If no event occurs on the server side, a timeout occurs, and the server asks the client to reconnect asynchronously.
在业务事件中通常认为所有事件的数据库是业务事务的记录，因此任何不能记录的事件就一定没有发生。
This is common in business events when the database of all events is regarded as a log of the business transactions, so anything that cannot be logged must not happen.
还有一项任务是在大量记录图像中搜索有没有事情发生或者寻找已发生事件的录像片段。
Then there is the task of searching through a mass of recorded images to see if anything has happened or to find a clip of an incident known to have taken place.
还有一项任务是在大量记录图像中搜索有没有事情发生或者寻找已发生事件的录像片段。
Then there is the task of searching through a mass of recorded images to see if anything has happened or to find a clip of an incident known to have taken place.
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