I brought you something today. This is a ship's branding iron.

我今天给你带来了一些东西。这是一艘船的烙铁。

Bill invented the method of using a hot branding iron to permanently put the mark of a ranch on a cow's skin. That helped stop people from stealing cattle.

比尔发明了一种方法，用热烙铁把牧场的印记永久地烙在牛的皮肤上。这有助于阻止人们偷牛。