unmixv.(使)不混合(使)无法混合.UNabbr.(=United Nations) 联合国pron.<口>人，事物，家伙，东西unparallel balance不对称平衡uncharged particle不带电粒子unblanking circuit正程增辉电路uncultivated field未耕地Unna's plasma cell无人照管和无家可归儿童unlicensed hawkers无照小贩undamaged checking无损检测unconfirmed rumour未经证实的传闻unlised securities未上市证券uncased drill hole无套管钻孔