If you need to wait on a blocking action — say, the results from a remote database query — it is not clear exactly how long you will need to wait for results to be available.

如果您需要等待一个阻塞操作—比如，对于来自远程数据库查询的结果—您不会确切地知道在可以使用结果之前究竟要等待多长时间。

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For those hedge funds set on playing Europe, the main dilemma they face is how long to wait before buying.

对于那些准备久战欧洲的对冲基金公司来说，他们面临的最大困境是要等多久才能买入。

youdao

If that is how long the world has to wait, we cannot hold our breath.

如果说这就是世界必须要等待的，那么我们将无法屏息以待了。

youdao

As banks continue to unravel underwater mortgages and homes are put on the market for resale in droves, it is uncertain how long the housing market will have to wait.

FORBES: SoCal Housing Market Weakens in October

The daftest thing of all about Mr Dobson's pledge is that it is not in fact the number of people waiting for treatment that matters: it is how long they have to wait.

ECONOMIST: Health

"There's just not an option right at the moment while we all wait and see how long this is going to take, " Mr Black said.

BBC: An empty checkout desk at Belfast International airport