UNI信令（用户网络接口信令）：UNI SIGNALING(User Network Interface Signaling)
UL30基因/单纯疱疹病毒1型：UL30 gene/Herpes simplex virus type 1
Unascertained集合：Unascertained Set
UniversalGrey集合：Universal Grey Set
U-Pb SHRI MP年代学：U-Pb SHRIMP chronology
Ustllago maydls：Ustilago maydis
UML（面向对象统一建模语言）：UML
U、Nb、Ta、Zr、Hf测定：U、Nb、Ta、Zr and Hf determination
UHMWPE/LDPE复合材料：UHMWPE/LDPE composites
User-Mode Linux：user-mode linux
Unigraphics二次开发：Unigraphics Development
UP-NETARM2410-S：UP-NETARM2410-S
USB Video Class：USB Video Class
USB主机（USB HOST）：ARM
U平台管理信息库（U-MIB）：U-MIB
uC/OS-II嵌入式操作系统：uC/OS-II
USB转RS232串口桥控制器：USB to Serial Bridge Controller
uC/OS-II嵌入式实时内核：uC/OS-II embedded realtime kernel
USB 2.0收发器宏单元接口：UTMI
US/H_2O_2系统催化氧化：US/ H_2O_2 Synergetic Technology
UV/H_2O_2/O_3工艺：UV/H_2O_2/O_3process
Ullmann C-S偶联反应：Ullmann C-S coupling reaction
U-Gas流化床空气鼓风气化炉：U-Gas fluidised bed air blown gasifier
UHMWEPE/LDPE复合材料：UHMWPE/LDPE composites
UNIFAC（Dortmund）：UNIFAC(Dortmund)
UHMWPE（超高分子量聚乙烯）：UHMWPE (Ultra High Molecular Weight Polyethylene)
UF-100全自动式尿沉渣分析仪：UF-100-full-auto Analyzer
Urotensin-Ⅱ受体拮抗剂：Urotensin-Ⅱ antagonist
UrbaniSARS相关冠状病毒：Urbani SARS-associated coronavirus
Unscented卡尔曼粒子滤波：particle filtering
UG/Manufacturing：UG/Manufacturing
Unix/Windows混合平台：Unix/Windows associated platform
UG/Open Uistyler：UG/Open Uistyler
UJ27/b型携带式直流电势差计：UJ27/b mode portable potentiometer
uniqueidentifier：uniqueidentifier
USBMassStorage协议：USB Mass Storage protocol
UleadVideoStudio：Ulead Video Studio
U_（sdpf）（16）-IBM：U_(sdpf) (16)-IBM
U（6/4）超对称SO（6）极限：the SO(6) limit of super symmetry U(6/4)
UDP-GlcNAc C4异构酶：Gne
U-Pb法锆石SHRIMP年代学：SHRIMP zircon U-Pb geochronology
UDP-葡萄糖基转移酶（UGT）：UDP-glucosyltransferase(UGT)
Ullmann-type偶联反应：Ullmann-type coupling reaction
USB Mass Storage：USB Mass Storage
UDDI（统一描述、发现和集成）：ASP
Unscented卡尔曼滤波算法：unscented Kalman filter
UV/H_2O_2/Fe~（2+）：UV/H_2O_2/Fe~(2+)
UCB1400,10-bitADC：UCB1400,10-bit ADC
UHMW-PE超高分子量聚乙烯纤维：ultra-high molecular polyethylene (UHMW-PE) fiber
UnscentedKalman滤波：Unscented Kalman Filtering
UL30基因/单纯疱疹病毒1型：UL30 gene/Herpes simplex virus type 1
Unascertained集合：Unascertained Set
UniversalGrey集合：Universal Grey Set
U-Pb SHRI MP年代学：U-Pb SHRIMP chronology
Ustllago maydls：Ustilago maydis
UML（面向对象统一建模语言）：UML
U、Nb、Ta、Zr、Hf测定：U、Nb、Ta、Zr and Hf determination
UHMWPE/LDPE复合材料：UHMWPE/LDPE composites
User-Mode Linux：user-mode linux
Unigraphics二次开发：Unigraphics Development
UP-NETARM2410-S：UP-NETARM2410-S
USB Video Class：USB Video Class
USB主机（USB HOST）：ARM
U平台管理信息库（U-MIB）：U-MIB
uC/OS-II嵌入式操作系统：uC/OS-II
USB转RS232串口桥控制器：USB to Serial Bridge Controller
uC/OS-II嵌入式实时内核：uC/OS-II embedded realtime kernel
USB 2.0收发器宏单元接口：UTMI
US/H_2O_2系统催化氧化：US/ H_2O_2 Synergetic Technology
UV/H_2O_2/O_3工艺：UV/H_2O_2/O_3process
Ullmann C-S偶联反应：Ullmann C-S coupling reaction
U-Gas流化床空气鼓风气化炉：U-Gas fluidised bed air blown gasifier
UHMWEPE/LDPE复合材料：UHMWPE/LDPE composites
UNIFAC（Dortmund）：UNIFAC(Dortmund)
UHMWPE（超高分子量聚乙烯）：UHMWPE (Ultra High Molecular Weight Polyethylene)
UF-100全自动式尿沉渣分析仪：UF-100-full-auto Analyzer
Urotensin-Ⅱ受体拮抗剂：Urotensin-Ⅱ antagonist
UrbaniSARS相关冠状病毒：Urbani SARS-associated coronavirus
Unscented卡尔曼粒子滤波：particle filtering
UG/Manufacturing：UG/Manufacturing
Unix/Windows混合平台：Unix/Windows associated platform
UG/Open Uistyler：UG/Open Uistyler
UJ27/b型携带式直流电势差计：UJ27/b mode portable potentiometer
uniqueidentifier：uniqueidentifier
USBMassStorage协议：USB Mass Storage protocol
UleadVideoStudio：Ulead Video Studio
U_（sdpf）（16）-IBM：U_(sdpf) (16)-IBM
U（6/4）超对称SO（6）极限：the SO(6) limit of super symmetry U(6/4)
UDP-GlcNAc C4异构酶：Gne
U-Pb法锆石SHRIMP年代学：SHRIMP zircon U-Pb geochronology
UDP-葡萄糖基转移酶（UGT）：UDP-glucosyltransferase(UGT)
Ullmann-type偶联反应：Ullmann-type coupling reaction
USB Mass Storage：USB Mass Storage
UDDI（统一描述、发现和集成）：ASP
Unscented卡尔曼滤波算法：unscented Kalman filter
UV/H_2O_2/Fe~（2+）：UV/H_2O_2/Fe~(2+)
UCB1400,10-bitADC：UCB1400,10-bit ADC
UHMW-PE超高分子量聚乙烯纤维：ultra-high molecular polyethylene (UHMW-PE) fiber
UnscentedKalman滤波：Unscented Kalman Filtering