Hypertoxic and highly residual pesticides and pesticides that may lead to secondary hazard toxicity are prohibited from use on grasslands.
禁止在草原上使用剧毒、高残留以及可能导致二次中毒的农药。
Other chemicals may have a variety of disadvantages such as toxicity or inability to penetrate residual blood and other organic materials.
其它的化学物质都可能有各种各样的缺点，例如：会有毒性或是对清除残血或是有机物质没有效果等。
The article discussed the environmental behaviors of toxaphene including its residual, biological toxicity, migration and degradation.
文章综述了毒杀芬残留、生物毒性、迁移与降解等环境行为；
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