“芑”的拼音为：qǐ...

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越南战场上用于毁灭林区的“橙剂”，其成分是二氧杂芑。Dioxin was the ingredient in Agent Orange, used to defoliate Vietnam.火葬会把二氧(杂)芑 、 盐酸 、 二氧化硫和二氧化碳排放到大气中.Cremation pumps dioxins, hydrochloric acid, sulfur dioxide, and carbon dioxide into the air...