But contained in the strategy are many unknowns and as Mr.Brown said, he is also dependent on the decisions of others.

VOA: standard.2009.11.10

I'm trying to write these two unknowns in terms of these two knowns and you can solve for them.

我会试着将这两个未知量,用这两个已知量表示出来 这样你们就可以求了

耶鲁公开课 - 基础物理课程节选

I want to show you how easy it is to change the code. But, notice, once I've added this I actually have a problem. This is now an under-constrained problem. I have more unknowns than I have equations.

我加上这个条件后,我马上面临一个问题了,这就是现在是一个非约束性问题了,我的未知数比方程数多,你从代数中可以知道。

麻省理工公开课 - 计算机科学及编程导论课程节选

Mr.Obama will interrupt a family weekend at the Camp David presidential retreat on Monday to lay a wreath at the Tomb of the Unknowns at Arlington National Cemetery.

VOA: standard.2009.05.23

And I am not going to take the time to solve it because I think that is a waste of class time, but those are the three unknowns.

但我并不打算把解这几个方程,我觉得那会是浪费课堂时间，但那是三个未知式。

麻省理工公开课 - 固态化学导论课程节选

But observers say there are plenty of unknowns, including whether Iran will cooperate with the tentative deal and to what extent the IAEA will be able to monitor Iran's nuclear efforts.

VOA: standard.2009.10.19

But what I needed to do this problem was to find these two unknowns.

但我解决这道题需要找到这两个未知量

耶鲁公开课 - 基础物理课程节选

So I have three equations and three unknowns.

现在我有了三个方程式和三个未知量。

麻省理工公开课 - 固态化学导论课程节选

Do you realize that this is a pair of simultaneous equations in which you can solve for these two unknowns, if you like, in terms of these two knowns and these coefficients, which are like these numbers, 3, 2, 4, and 6?

你们是否发现这其实就是一个方程组,你可以用它来解出这两个未知量,你愿意的话,可以用这两个已知量,和这些系数,比如这些数字,3,2,4和6

耶鲁公开课 - 基础物理课程节选