Contact your doctor if the cough persists.

如果还咳嗽，就去看医生。

These problems persisted for much of the decade.

这些问题在那十年的大部分时间里一直存在。

The ceremony still persists in some parishes.

该仪式在一些教区仍存在。

Why do people persist in begging for money in the street?

为什么人们非要在街上乞讨呢？

He urged the United States to persist with its efforts to bring about peace.

他敦促美国坚持促进和平。