unus一
UNabbr.(=United Nations) 联合国pron.<口>人,事物,家伙,东西
unciform eminence[医] 禽距
unrammed concrete未夯实混凝土,未捣实混凝土
undiscovered loss未发觉的损失
unpaired allosome[医] 单染色体
unlearning theory反学习理论
uncased component无封装元件
undisturbed sleep不受侵扰的睡眠
unpaired electron不成对电子
"She was rather perturbed by the news that her father was seriously ill"
"unhinge the door"