目的为了解新型除草剂仲丁灵原药的毒性及其亚慢性毒性的阈作用剂量和最大无作用剂量，并为长期毒性试验提供充分的毒理学资料。
To explore the sub-chronic toxicity of pdibutalin and the largest ineffective dosage, and provide sufficient toxicological data for long-term toxicological experiments.
但是环境毒理学研究发现氟虫腈对生态环境具有潜在的危险性，并且具有慢性神经毒性。
With wide application of fipronil, the coming problems of ecological risks and environmental pollution were increasingly serious, and fipronil was also provided with chronic neurotoxicity.
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