But for many materials -- known as ohmic materials -- Ohm's law works quite well.

但对于许多材料——称为欧姆材料 欧姆定律非常有效。

Now, in ohmic materials, we can use our new expression of Ohm's Law to predict and calculate the behavior of a circuit.

在欧姆材料中，我们可以使用欧姆定律的新表达式来预测和计算电路的行为。

And if you want to find the power that's consumed by a resistor, you can substitute Ohm's law into the power equation to discover some helpful relationships that hold true for all ohmic materials.

如果你想找到电阻消耗的功率，你可以用功率方程代替欧姆定律，以发现一些适用于所有欧姆材料的有用关系。