An aggressive service-invocation timer is set to the reasonable expected response time of the service, with some consideration for transient delays.
主动型服务调用计时器设置为服务合理的预期响应时间，并对传输延迟予以一定的考虑。
2
More precisely, the redisplay occurs after some kind of asynchronous event related to the view, such as a keystroke, a timer completion, or a response to an HTTP request.