Before about 5,000 years ago, math was all about known quantities.

在大约 5000 年前之前，数学是关于已知量的。

He was a veteran close with Trump, which Israeli voters appreciated, a known quantity in Washington.

他是与特朗普关系密切的老兵，以色列选民对此表示赞赏，这在华盛顿是众所周知的事情。

Indeed, boomerang hires-people who leave an employer and then come back-can offer a valuable blend of known quantity and new skills.

事实上，回旋镖招聘--离职的人又回到老东家--可以让已知数和新技能结合起来，这是非常有价值的结果。

It gives us a way of understanding the relationship between known and unknown quantities that lets you solve an infinite number of problems.

它给我们提供了一种理解已知和未知量之间关系的方法，可以让你解决无数的问题。

So, really, the best way to conquer the fear of the unknown is to make the test as much of a known quantity as possible.

因此，战胜此种恐惧的最好办法，其实就是尽可能地让测试成为已知量。