chronic ·adjective
Definition: A chronic illness or problem continues for a long time. Level: C2
英国国家医疗服务体系正面临长期的护理人员短缺。
The NHS is facing a ___chronic shortage of nursing staff.
他多年来一直患有慢性背痛，并尝试了各种治疗方法。
He has suffered from ___chronic back pain for many years and has tried various treatments.
建筑工地持续不断的噪音导致居民长期疲劳和压力巨大。
The constant noise from the construction site led to ___chronic fatigue and stress among the residents.