sporadicadj.不定时发生的；零星的sporadic Alzheimer disease散发性阿尔茨海默病sporadic visceral myopathy散发性内脏肌病变sporadic drug-trafficking零星贩毒Sporadic cholangiocarcinoma散发性胆管癌sporadic compression anchor分散压缩型锚杆sporadic depressive disease散发性抑郁症sporadic goitrous cretinism散发性甲状腺肿克汀病Sporadic Alzheimer's disease动压头sporadic hypertriglyceridemia散发性高甘油三酯血症Sporadic colorectal carcinoma散发性结直肠癌