But for the carreteros–the people who buy scrap metal–it's very difficult.

但对于购买废金属的人来说，这是非常困难的。

In some big cities, you can find markets where people sell scrap metal and electronics, and some people buy the scrap and use it to build their own cars and electronic devices.

在一些大城市，你可以找到人们出售废金属和电子产品的市场，有些人购买废品并用它来制造自己的汽车和电子设备。