Ungap不隔
UNabbr.(=United Nations) 联合国pron.<口>人,事物,家伙,东西
UN Study Examines Disater Risks联合国的减灾调查
undifferenced phase observation非差相位
unconsolidated confined aquifer松散承压含水层
unconventional treatment method非常规处理
unmanned combat aerial vehicles无人作战飞机
Unclassified Miscellaneous Ship非保密其他舰艇(美国)
untuned iron-core transformer未调谐铁心变压器
uncooked materials fermentation生料发酵
undirectionary rate sensitivity单向变化率敏感性