There the poor, often including children, dismantle dumped PCs and phones, stripping the components for the valuable — and toxic — metals contained inside.
这些国家穷人，通常是孩子，负责拆解废旧电脑和电话，分拣含有有毒贵金属的零件。
2
What caused the poor bleachability of dip fines ? the two factors coming from external contamination were : residual ink and transition metals in pulp, specifically iron.
摘要什么使得脱墨浆细料的漂白反应性能差？是来自内部杂质的两个因素：残余油墨和过渡金属，特别是铁。
3
What Caused the poor bleachability of DIP fines? The two factors coming from external contamination were: residual ink and transition metals in pulp, specifically iron.