understandability n.易懂性；可理解性understand trap 機警，聰明understand tacitly 心領(lǐng)神會understand his kind father 理解他好心的父親understand clearly 清楚地懂得 清楚地了解understand (v.) understand (a) language understand vt. 理解；懂；獲悉；推斷；省略；明白 vi. 理解；懂得；熟悉understain 淺染understaffed adj.人員不足的undersquare 下耳戳underspend vt.vi；underspeed n.速度不足(降低速度)undersonic adj.次聲的undersong n.伴唱之歌；重疊句；隱匿之意義undersole 大底,鞋底undersold v. 低價出售(拋售； 售價比 ... 低)undersoil n.下層土(底土)undersocialization 社會化不足underslung worm [能源科學技術(shù)]下置式蝸桿