These are usually highly toxic substances from coal or from asphalt refining, and has led to cancer.
这些高毒性物质通常是从煤或沥青炼制而来，而有导致癌症的可能。
Counterfeit medicines range from products containing no active ingredients to those containing highly toxic substances.
假冒药物范围很广，既有不含任何有效成分的产品，也有含剧毒物质的产品。
Traditional disinfection technologies such as the use of chloride or ozone, the disinfectant itself are highly toxic, flammable and explosive substances.
传统的消毒技术如采用氯化物或臭氧，其消毒剂本身就是属于剧毒、易燃、易爆的物质。
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