这种农作物曾经使用过毒杀芬，但由于其对环境的危害已被禁止。

This crop was once treated with ___toxaphene, but it's now banned due to environmental risks.

这种农药含有毒杀芬，一种已被禁止使用的有机氯化合物。

This pesticide contains ___toxaphene, an organochlorine compound that has been banned.