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U.S. Route 101 - (美国101号公路)

U2 (band) - (U2)

Udit Narayan - (Udit Narayan)

Uncertainty principle - (不确定性原则)

Undulator - (纠偏器)

Unit of length - (长度单位)

Unit vector - (单位向量)

United Kingdom - (联合王国)

United States - (美国)

United States Air Force Academy - (美国空军学院)

United States at the 2018 Winter Paralympics - (美国在2018年冬季残奥会上。)

United States Bill of Rights - (美国的《权利法案》)

United States Congress - (美国国会)

United States customary units - (美国习惯单位)

United States dollar - (美元)

United States metropolitan area - (美国大都会区)

United States Naval Academy - (美国海军学院)

University of California, Berkeley - (加州大学伯克利分校)

University of California, Berkeley - (加州大学伯克利分校)

University of California, Los Angeles - (加州大学洛杉矶分校)

University of California, Los Angeles - (加州大学洛杉矶分校)

University of Southern California - (南加州大学)

University of St Andrews - (圣安德鲁斯大学)

Univision - (Univision)

UNIX - (UNIX)

Unter den Linden - (林蒑下)

Uranium - (铀)

Urine - (尿液)

Usenet - (Usenet)

Usher - (Usher)

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