urethral discharge尿道排出物 uridine diphosphate尿苷二磷酸,二磷酸尿苷 ulcerative dermatosis溃疡性皮肤病 uroporphyrinogen decarboxylase尿卟啉原脱羧酶 ulnar deviation尺骨偏斜,尺骨偏差 unit dose单位剂量,剂量单位 ulcer,duodenal十二指肠溃疡 dihydrouridylic acid双氢尿嘧啶核苷酸 urethral drainage尿道引流(法) urinary drainage尿的引流(法) uterine delivery子宫分娩