Ungap不隔
UNabbr.(=United Nations) 联合国pron.<口>人,事物,家伙,东西
undetermined parameters method待定系数法
unweighted and weighted network无权和有权网络
undifferentiated acute leukemia未分化急性白血病
unfavorable balance of payments[经] 国际收支逆差
unbalance distributed parameter不平衡分布参数
unrecognizable invisible assets不可辨认无形资产
unconfined compressive strength无侧限抗压强度
Unclassified epileptic seizures未分类的癫痫发作
unfired steam generating vessel非直接火蒸汽锅炉
unexposed film length indicator未曝光胶片长度指示器