Now, you may have noticed that there's an integral on the left-hand side of the equation for Ampere's law.

现在，您可能已经注意到在安培定律等式的左侧有一个积分。

But the equation he came up with, the one that we now call Ampere's Law, allowed him – and future physicists! – to figure out what B was in a lot of situations, including the case of the two parallel wires.

但是他提出的方程式，我们现在称之为安培定律的方程式，允许他 - 以及未来的物理学！ - 看看B在很多情况下是什么，包括两条平行线的情况。