unkey[美俚]黑人老头子UNabbr.(=United Nations) 联合国pron.<口>人，事物，家伙，东西unlink system call[计] 解链系统调用undirectional flow不定向流unprotect document撤消文档保护unhydrated plaster干灰膏unmonotonic points歧点unmasked interrupt非屏蔽中断unbalaneed tension不平衡张力unguarded interval未保护时间undetected failure未发现的故障Unterberger's test[医] 输卵管卵巢炎