Unell于内尔
UNabbr.(=United Nations) 联合国pron.<口>人,事物,家伙,东西
unfractionated heparin普通肝素
Unechte Gesamtschulden不真正连带债务
unmarked present tense非标记现在时态
unmanned helper engine无人驾驶辅机
unconstrained velocity速度无约束
undemocratic decisions专制的决定
uncontrolled particles无控粒子
unbleached softwood KP未漂硫酸盐浆
undistributed dividend未分股利
unperceived inbreeding非预期近交