来自persist,坚持。

1. Shoppers picked their way through puddles caused by persistent rain.

购物的人们小心翼翼地择路避开由于连续下雨形成的水坑。

2. His cough grew more persistent until it never stopped.

他咳嗽持续的时间越来越长，直到咳个不停。

3. Persistent damage or inadequate healing may lead to chronic lameness.

反复受伤或治疗不当可导致长期跛足。

4. Johnny was the most persistent and most harmless of her admirers.

约翰尼是追她的人中最痴心、最没有心机的一个。

5. His persistent attempts to complain to his superiors were blocked and ignored.

他一再试图向上级投诉，但都被挡了回来并置之不理。