URBMn.最远程弹道导弹Urn.铀uranyl fluoride氟化铀酰urogenital fold尿生殖褶, 尿道褶Uroleptus sp.瘦尾虫urocaninic acid尿刊宁酸urious interest高息urinopycnometer尿比重瓶uropygial gland尾脂腺urorectal septa[医] 尿直肠隔, 泄殖腔隔uranous sulfide二硫化铀uranothorianiten.方铀钍石