underestimate
underestimate/ˈʌndəˈestimeit/vt.对…估计不足，低估：underestimate the difficulties低估困难Never underestimate the power of a woman.千万不要低估一个妇女的力量。
undergo
undergo/ˌʌndəˈɡəu/vt.经历，遭受：undergo much suffering遭受许多苦难；undergo a long process of training经过长期锻炼；undergo an operation经受手术
undergraduate
undergraduate/ˌʌndəˈɡrædjuit/n.［c］大学本科生(尚未取得学士学位cf. postgraduate研究生)：a qualified undergraduate一位合格的大学本科生；an undergraduate at Oxford牛津大学的学生···
underground
underground/ˈʌndəɡraund/ I.adj.1.地(面)下的：an underground railway地下铁道；underground exploration地下勘探；underground water地下水；underground worker地下工作者2.秘密的，不公···
underlie
underlie/ˌʌndəˈlai/vt.(underlay /ˌʌndəˈlei/, underlain /ˌʌndəˈlein/; underlying)对…有影响，潜在的原因：Psychological problems very often underlie apparently physical d···
underline
underline/ˌʌndəˈlain/vt.在…下划线；强调：underline a sentence in red在句子下划红线；underline discipline强调纪律性Please underline the noun clauses in the passage.请用线画出短···
underlying
underlying/ˌʌndəˈlaiiŋ/adj.1.含蓄的，潜在的：An underlying uncertainty made him act in anervous manner.潜在的不确定因素使他们行动有些紧张。［考句］Franklin argued that the dep···
undermine
undermine/ˌʌndəˈmain/vt.1.暗中破坏，逐渐削弱：Drink is undermining his health.饮酒使他的身体垮下去。She jealously tried to undermine our friendship.她出于妒忌竭力破坏我们的友谊···
underneath
underneath/ˌʌndəˈni:θ/ I.prep.在…下面：underneath the tree在树下Put the date underneath the address.把日期写在地址下面。‖II.adv.在下面，在底下：a building with solid foundat···
underscore
underscore/ˌʌndəˈskɔ:/vt.划线于…下；强调（同underline）：These failuresunderscorethe difficulty of what we're attempting to do.这些失败显示出我们想做的事情的困难性。The P···
