Rub a steel file with a flint in a dark room, and notice what pretty sparks you get.

在黑暗的房间中用钢锉在燧石上摩擦, 就能够看到漂亮的火花。

I'm just basically using a type of Steel file which is called a float, it's something you want to do like quickly and you want to just like get those points down to even out the chewing surface.

我基本上用的是一种叫做浮刀的钢锉，这是一种你想要快速完成的东西你想要让这些点向下均匀咀嚼表面。