Knock on closed doors — and wait to see if there's a response — before entering.

对于闭着的门，进去前要先敲门，并且要等回应再进去。

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The downside is that the worker process on the server has to wait for the session to be closed by the client before it can move on to the next request.

其缺点在于服务器上的 worker 进程必须等待客户机要关闭的会话，之后才能转到下一个请求。

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Knock on closed doors and wait to see if there's a response before entering.

门若是关着的，请敲门，等着回音，再进去。

youdao

It turns out that Motorola didn't want to wait until the Google deal closed -- or, for that matter, an American launch -- to undertake a significant revamp of its phone line.

ENGADGET: Motorola shows three all-touch Android 4.0 phones in China, we see a possible Verizon model

However Laurel, 20, was unable to wait and 15 minutes after the park closed on Friday she broke into the other cage.

BBC: Seal scales fence to reach pup at St Andrews Aquarium

Arrive at Slow Food-endorsed Il Carroccio (closed Wednesdays) much later than 12:30pm and risk a prolonged wait out on the sidewalk.

BBC: Two days in Siena, Italy