像图中的越南，通常这样的熔炼在是距离住所很近而且没有任何污染控制的地方进行的。
Too often such smelting, like that pictured here in Vietnam, happens in backyards without any pollution controls.
像图中的越南，通常这样的熔炼在是距离住所很近而且没有任何污染控制的地方进行的。
Too often such smelting, like that pictured here in Vietnam, happens in backyards without any pollution controls.
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