per-,完全的，-sist,站立，坚持，词源同stand,assist.

1. If the symptoms persist, it is important to go to your doctor.

如果这些症状持续存在，一定要去看医生。

2. Mr Straw issued a stern warning to those who persist in violence.

斯特劳先生向那些坚持进行暴力活动的人发出了严正警告。

3. Why does Britain persist in running down its defence forces?

为什么英国要坚持消减其军事防御力量？

4. Politicians persist in imagining that "the people" warm to their cheesy slogans.

政客们还在想象着“人民”对他们的空洞口号会越来越感兴趣呢。

5. Existential questions requir-ing religious answers still persist.

需要通过宗教来解释的关乎人类存在的问题仍然存留。