Untul温图尔UNabbr.(=United Nations) 联合国pron.<口>人，事物，家伙，东西UN Office at Addis Ababa联合国亚的斯亚贝巴办事处Unprotected sex behavior非保护性性行为unbalanced short circuit不平衡短路unbalanced three-phase三相不平衡unconscionable behaviour不合理的行为unexposed diffusion zone未暴露扩散区Unwritten law of the sea海上不成文法unfathomable theories.难以了解的理论unfeathering accumulator回桨蓄压器unemployment relief work失业救济工作