Long Polling: Also known as Asynchronous Polling, this method is a hybrid of pure server push and client pull.

长时间轮询：也就是所谓的异步轮询，这种方式是纯服务器端推送方式和客户端拉取方式的混合。

youdao

The agent periodically polls the Device Manager server to receive any jobs that need to be processed for the client (pull).

代理将定期轮询Device Manager服务器，接收任何需要处理的作业。

youdao

Lifschitz's attorney told the C5N television station that on Friday night, at around midnight, a passing car forced his client to pull over in Buenos Aires' Villa Devoto neighborhood.

CENTERFORSECURITYPOLICY: Center For Security Policy

The biggest addition is pull-to-refresh, which the iPhone client has had for a while, as an option bar that's revealed by swiping on a tweet.

ENGADGET: Twitter for Android updated, adds speed, polish, more options

He alluded to evidence given by his client's mother Maxine, 45, who admitted seeing her son pull the hair of one of his alleged victims and drag her to a car after she spat at him.

BBC: Pregnant mother