translation.en: They extract what they can, which is mostly the metals -- circuit boards and so forth -- and they leave behind mostly what they can't recover, which is, again, mostly the plastics.
translation.zh: 他们挑出他们能挑出来的东西，大多都是金属-- 电路板等等-- 然后留下大部分他们不能回收的 其中多数还是塑料