The second, known as piggyback, doesn't create any connections to the server. Instead, it waits until another DWR service call occurs and piggybacks pending events onto this request's response.

第二种称为piggyback，这种机制并不创建任何到服务器的连接，相反，将一直等待直至发生另一个DWR服务，piggybacks使事件等待该请求的响应。

youdao

The update() function can be used (on any widget) to force rendering and to wait until all pending events have been processed.

函数 update() 用于（在任何部件上）强制渲染并且等待所有进行的事件全部完成。

youdao

Even the pending reshuffle, usually an opportunity to shape events, has become a crisis-in-waiting.

即使内阁重组，以前通常是处理问题的机会，现在也成了一触即发的危机。

youdao

McCain senior adviser Mark Salter said that the campaign will suspend airing all ads and all campaign events pending Obama's agreement.

CNN: McCain, Obama headed to Washington for bailout talks

Even the pending reshuffle, usually an opportunity to shape events, has become a crisis-in-waiting.

ECONOMIST: The prime minister has never been closer to losing office

"A pending commission requirement would force companies to disclose a burgeoning menu of material events in just two days, " writes Katz.

FORBES: Digital Rules