"I do not know the volume. The volume is uncertain. There is a large uncertainty range around the 5000 barrels.

VOA: standard.2010.05.02

Galileo himself is viewing the situation from a fallen and an unperfect, uncertain perspective.

伽利略自身在从一个堕落的，不完美的，不确定的角度，审时度势。

耶鲁公开课 - 弥尔顿课程节选

The uncertain status of divine providence here, I think, is made clear by its figuration as a moon.

这里神圣的天意的不确定的地位，被月亮这个比喻表现的更为清晰。

耶鲁公开课 - 弥尔顿课程节选

Progress is not going to be even. There is going to be a period where it is going to feel very bad still and very uncertain.

VOA: standard.2009.04.05

And So, Descartes used the method of doubt to say there's something really different about having a body that's always uncertain, from having a mind.

因此,笛卡尔运用怀疑方法得出,与拥有不可确定的身体不同,拥有心理是肯定的

耶鲁公开课 - 心理学导论课程节选

But Weissman says the survey by Green Seal and the firm EnviroMedia Social Marketing shows that consumers are uncertain how to tell whether a product helps the environment.

VOA: standard.2009.03.30

That is our mission,". "And the president described it in no uncertain terms in his inaugural when he said, 'Our nation is at war against a far-reaching network of violence and hatred.' And to win this war against al-Qaida, the administration continues to be unrelenting, using every tool in its toolbox and every arrow in its quiver,"

VOA: standard.2009.08.06