Chronic fatigue syndrome (CFS) : Sudden debilitating fatigue of unknown cause.
慢性疲劳症候群：不明原因的突然虚弱疲劳。
Autism is marked by a variety of difficulties in social interaction and behavior, from the awkwardness of Asperger syndrome to severely debilitating repetitive behaviors and an inability to speak.
自闭症表现为各种社交和行为困难，可表现为阿斯·佩格综合症的笨拙，也可是严重双重行为和说话障碍。
Fibromyalgia is a debilitating pain syndrome that affects 2 percent to 4 percent of the population.
纤维肌痛是一种导致人虚弱的疼痛综合征，大约影响2 - 4%的人群。
Doctors don't know what causes chronic fatigue syndrome, characterized by debilitating fatigue and chronic pain with symptoms that can wax and wane over time.
医生们不知道慢性疲劳综合症的致病原因。该病的特征是使人虚弱无力的疲倦、慢性疼痛，症状的轻重则可能随时间变化。
Doctors don't know what causes chronic fatigue syndrome, characterized by debilitating fatigue and chronic pain with symptoms that can wax and wane over time.
医生们不知道慢性疲劳综合症的致病原因。该病的特征是使人虚弱无力的疲倦、慢性疼痛，症状的轻重则可能随时间变化。
应用推荐