In other words, the unknown value isn't the result.

换句话说，未知值不是结果。

He decided to use vowels for unknown values, like in this equation, which we'd simply write like this today.

他决定用元音表示未知值，就像这个等式，我们今天就这样写。

Now you’ve got your loops, and you’re going to use them to solve the three unknown current values.

现在您已经有了循环， 您将使用它们来求解三个未知电流值。

Now you've got your loops, and you're going to use them to solve the three unknown current values.

现在你已经有了你的循环，你将使用它们来解决三个未知的电流值。