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Cyanide and Cr ( VI ) are highly poisonous substances that cause serious environmental pollution when discharged arbitrarily.
氰化物和六价铬都是剧毒物品,随意排放会导致严重的环境污染.
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They also say poor quality pesticides may contain poisonous substances or substances that are not pure.
劣质杀虫剂中可能包含有毒物质或不纯物质.
毒性药品???
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