The term " plug nickel, " however, describes something that is " worthless" – that's not worth very much money.

然而，术语“塞镍”描述的是“毫无价值” 的东西——不值多少钱。

That's the origin of " plug nickel, " meaning something that was worthless, something that didn't have the metal that it was supposed to have.

这就是“plug nickel” 的起源，意思是没有价值的东西，没有它应该有的金属的东西。