UNCAC反腐败公约UNabbr.(=United Nations) 联合国pron.<口>人，事物，家伙，东西undisturbed one output signal未干扰“1”输出信号uncoupling lever bracket slot车钩提杆凹槽unbreathable exhaust fumes.令人窒息的废气uncorrelated random variables[统]不相关的随机变量unconfined specimen equipment无侧限制件设备undifferentiated igneous rock未分异火成岩unbridgeable generation gap.不可逾越的代沟。unlicensed business operations无照经营unconventional cross-section非常规断面unfixed deadline work contract无固定期限劳动合同