persistence of pesticide

例句：

1. 1.The persistence of the disease is amajor concern for doctors.
   这种疾病的持续存在是医生们的主要担忧。
2. 2. Thescientist persisted in hisresearch despite the lack of funding.
   这位科学家不顾资金短缺，坚持进行研究。
3. 3. The team's persistencepaid off when they finally solved the problem.
   团队坚持不懈，最终解决了这个问题。