以 Facebook 为例，该公司表示，在该链接被重用之前，数据可能会一直存在，通常是“在很短的时间之后”，不过很明显，这段时间的长度可能很不确定。

In the case of Facebook, the company says data may hang around until the URL in question is reused, which is usually "after a short period of time", though obviously that time can vary considerably.

youdao

由于业务协议可能是既不可执行也不确定但仍可表示为一个流程，所以BPEL把它称之为抽象流程。

Because a business protocol may be neither executable nor deterministic but still expressed as a process, BPEL refers to it as an abstract process.

youdao

很多州对此表示不确定。

Many states are not so sure.

youdao

you could leave your response to the invitation slightly open-ended by saying you're not sure.

你可以表示你不确定，开放性地回复这个邀请。

I don't know 课堂 - SpeakingMax英语口语达人