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

很不确定的是，这些标准究竟会有多么严厉？

The big uncertainty is over just how strict the standards will be.

youdao

在这个算法中，处理缓冲区的次序是很不确定的。

In this algorithm, the order in which buffers get processed is much less deterministic.

youdao

We can't know exactly and this is one of the wonderfully unsettling things about this stanza we can't know exactly to whom Milton is addressing this stanza.

我们不能确切的知道,而这也是这一段很奇妙的不确定性所在,我们不能确切的知道弥尔顿这一段是在对谁讲话。

耶鲁公开课 - 弥尔顿课程节选

I don't know about that. I am not so sure." But then, we realized that like when we walk out that door, it's the whole world again. So you get sucked up by your group, by your sort of identity.

我不知道，不是很确定，然后呢，我们就意识到走出那个大门，又是一个完整的世界，所以你就会,被你的团体，你的身份所束缚。

普林斯顿公开课 - 人性课程节选

You always want to check your signs at the and because it's so easy to get the sign wrong, and I was hoping that it was right here because I wasn't sure, but it turned out to be right.

我们完成计算时，一定要记得检查符号,因为很容易弄错符号，刚才我就不太确定,是否弄错了符号，检查发现没有问题。

麻省理工公开课 - 热力学与动力学课程节选