And once you start, you'll find you know almost all of the stuff anyway—it is, as I said, mostly a matter of cleaning the rust off the drillbits and sharpening the blade of your saw.

一旦开始学，你会发现其实多半内容你早就会了——就像我前面说的，很大程度上这就好比清理钻头上的锈渍，或者磨利你的锯子。