So why will steel wool burn but not the Brooklyn bridge?

所以为什么钢丝会烧着，但布鲁克林大桥不会？

You might also find ... This is called steel wool.

您可能还会发现… … 这就是所谓的钢丝绒。

Steel wool burns because these long strands have huge surface areas that are exposed and ready to react with the oxygen in the air.

钢丝烧得很快，因为这些长线有更大接触面暴露（在空气中），准备与空气中的氧发生反应。

This steel wool is basically just thinly shaved metal that's mostly iron, and the more fine, the more surface area the metal has, the easier it is to burn.

钢丝大概就是削得很细的金属，大部分是铁，并且更精纯，金属的接触面越大，越容易燃烧。

But those tiny little threads of steel wool are so thin that there isn't any room for the heat to spread out so the iron quickly reaches its ignition temperature.

但是那些小钢丝线那么细，以至于没有可以传递热量的余地，所以铁丝很快就达到燃点。