chronic fatigue的用法和樣例：
例句
- Many with Chronic Fatigue Syndrome are doing things they hadn't done in many years.
有慢性疲勞症癥狀者恢復多年不曾做的活動。 - CFS is characterized by debilitating fatigue and chronic pain, but there are no specific treatments, and the diagnosis is often made by ruling out other diseases.
慢性疲勞綜合症的特點是感覺衰弱疲勞並伴有長期疼痛，但沒有有效的治療方法，其確診通常也是通過排除其他疾病。
