One was avoiding sending any substantial message at all when nothing had changed since the prior request.

其中之一是，如果自前一个请求发出以后内容没有发生任何改变，则避免发送任何实质性消息。

youdao

One was avoiding sending any substantial message at all when nothing had changed since the prior request.

其中之一是，如果自前一个请求发出以后内容没有发生任何改变，则避免发送任何实质性消息。

youdao