Cancer is a kind of persistent ailment.

癌症是一种顽症。

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Enterprises' receivable funds resulting in selling on credit is a persistent ailment for them.

由赊销方式形成的企业应收账款一直是困绕企业的顽症。

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The formation of the persistent ailment of street peace order is affected by various elements.

街面治安顽点的形成受各种因素的影响。

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Sangomas believe that a persistent physical ailment is often a manifestation of a spiritual upset and they first need to address that, then they are guided by the ancestors on what the physical sickness is and how best to treat it, using traditional medicine.

BBC: Witnessing a South African healer at work