And perils known and unknown will grow as we go on.

越往前走已知的或未知的凶险便越多。

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The Session Facade pattern can be used with both known and unknown actors.

会话虚包模式可用于已知的和未知的参与者。

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Investors face a world marked by "known and unknown unknowns", in the words of Donald Rumsfeld, a former American defence secretary.

用美国前防长拉姆斯·菲尔德的话来讲，投资者身处一个“已知的未知和未知的未知”的世界。

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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 like countless battles, known and unknown, it is a proud chapter in the story of the American soldier.

WHITEHOUSE: President Obama Bestows Presidential Unit Citation on the Blackhorse Regiment | The White House

My work is trying to map that in-between space between known and unknown, the constant hovering between two states.

ECONOMIST: Contemporary art

But they did more than just survive in the grass green water, dense with algae and other substances, known and unknown.

FORBES: Oysters Are Back In New York City Waters