And wecount these moments. These moments when we dare to aim higher, to break barriers, to reach forthe stars, to make the unknown known. We count these moments as our proudest achievements.

我们珍视这些时刻，这些我们敢于追求卓越、突破障碍、探索星空、揭开未知面纱的时刻，我们将这些时刻视为我们最值得骄傲的成就。

youdao

Moreover, the unknown is often more terrifying than the known.

而且，未知的往往比已知的更可怕。

youdao

Taking the unknown data point, the distance between the unknown data point and every known data point needs to be computed.

对于一个未知的数据点，这个未知数据点与每个已知数据点之间的距离需要被计算出来。

youdao

Diakite,who is also known as Toumba, escaped the attack and is still at large with an unknown number of soldiers from the presidential guard.

VOA: standard.2009.12.07

That's how by either balancing the unknown force with a known force or by simply measuring the acceleration as I fall towards this podium and multiplying by mass, you can find the force that exerts on me.

我们既可以让未知力与已知力平衡,也可以只测量我冲向讲台时加速度的大小,再与我的质量相乘,都能求出作用在我身上的力的大小

耶鲁公开课 - 基础物理课程节选

But the difference, overall, last year vs. heading in, you know, this year heading into '10 is the unknown vs. the known.

FORBES: Intelligent Investing Briefing Book

Soon, he hopes, the unknown will be known.

NPR: Golden: Miami Has Already Paid Stiff Penalties

If Spain tips into crisis in the next few months, the odds are that it will be because of something nasty happening to balance sheets at the local level which shocks the markets - in Donald Rumsfeld's phrase, that is the 'known unknown' that makes everyone nervous.

BBC: Eurozone crisis: what have we learned?