Unuma宇沼
UNabbr.(=United Nations) 联合国pron.<口>人,事物,家伙,东西
unrecognized command未被识别命令
unprocessed messages未作处理消息
ungraphitised carbon非石墨化碳
undiluted engine oil未稀释的发动机油
unpardonable liberty不可原谅的失礼
"an unbarred door"
"went through the unlatched gate into the street"
"an unlocked room"