Unkeln.温克尔(在德国；东经 7º14' 北纬 50º35')UNabbr.(=United Nations) 联合国pron.<口>人，事物，家伙，东西Unmanned Launch Operation无人发射操作undisturbed cohesive soil原状土unbiassed ratio estimator无偏比估计量unclassified bibliography公开文献目录unenhanced Raman spectrum未增强拉曼谱uncontrolled intersection无管制交叉口uncompetitive enterprises劣势企业unproper family education家庭教育异化unequai-addendum system[机] 不等齿冠系unbounded operator matrix无界算子矩阵