translation.en: They recover the metals and leave behind what's called shredder residue -- it's their waste -- a very complex mixture of materials, but predominantly plastics.
translation.zh: 然后他们把金属复原 同时把叫做回收余渣的东西丢弃--过程所产生的废物-- 一种非常复杂的混合物 但主要是塑料