unfrequent

adj.

不常发生的，不常见的；

[Adrenal carcinoma: an unfrequent cause of severe hypokalemia].
[Crystal arthropathies, an unfrequent cause of poplyteal cyst].
[Sclerosing sertoli cell tumor. An unfrequent type of testicular neoplasm].
[Ureteral obstruction: an unfrequent complication of Burch colposuspension. Report of two cases].
Mining Interesting Disjunctive Association Rules from Unfrequent Items
Mining Interesting Disjunctive Association Rules from Unfrequent Items
[Descending necrotizing mediastinitis: an unfrequent life-threatening complication]
[Granulocytic sarcoma (chloroma) of small bowel: an unfrequent cause of intestinal obstruction]
Laryngeal Chondrosarcoma: an Exceptional Localisation of a not Unfrequent Bone Tumor.
Granulocytic sarcoma (chloroma) of the small bowell: an unfrequent cause of intestinal obstruction