Unbei耘平(名,日本)UNabbr.(=United Nations) 联合国pron.<口>人，事物，家伙，东西unfavorable review不利的评论unbalanced network非平衡网络unentitled dispose无权处分undisturbed strata未变动岩层unbalance of trade贸易不平衡unbreakable cipher不可破密码unversity students大学生undetectable error不可检测的差错unconfined mixture无限制混合undulatory current波动电流