UNEPabbr.United Nations Environment Programme 联合国环境规划署UNabbr.(=United Nations) 联合国pron.<口>人，事物，家伙，东西unclaimed balance不动户余额,无人提取的存款unexpired premium未满期保险费unnavigable river不通航河流unmodulated noise(无线电) 未调制噪音unpersuadablenessn.不能说服unchamfered joint无坡口接头unhappily married婚姻不幸福Un-separability不可分性unbalance loading偏载unregister system无记名式