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BNC: 18003 COCA: 18120

a poisonous chemical of a type produced when substances used for killing plants are made二恶英

Highly toxic dioxins were released into the air.有剧毒的二恶英被排放到了空气里。
BNC: 18003 COCA: 18120
BNC: 18003 COCA: 18120
BNC: 18003 COCA: 18120
dioxin
Products of chemical reactions and processes: crystal, dioxin, distillate...

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