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ultimatum
Detail    speak
n.
(最后通牒) last offer; final statement of terms made by one party to another
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ultrasonic
Detail    speak
a. Syn. supersonic
(超音速的,超声(波)的) supersonic; higher in frequency than the range of sound perceptible to the human ear
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ultraviolet
Detail    speak
a.
(紫外线的) wave lengths shorter than light but longer than X rays
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unadorned
Detail    speak
a. Syn. plain; unembellished
(未装饰的,朴实的) without adornment; simple or plain; not admirable
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unanimous
Detail    speak
a. Syn. uniform; agreed
(全体意见一致的) uniform; in complete agreement
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unbearable
Detail    speak
a. Syn. unendurable; intolerable
(无法忍受的,承受不住的) unendurable; so unpleasant, distasteful, or painful as to be intolerable
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unbridled
Detail    speak
a. Syn. violent
(放肆的,肆虐的) violent; not restrained or controlled
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unbroken
Detail    speak
a. Syn. uninterrupted; intact
(完整的,持续的) continuous, without interruption; intact
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uncharted
Detail    speak
a.
(地图上没标明的) not surveyed or investigated; not charted or recorded on a map or plan
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unconditional
Detail    speak
a.
(无条件的,无限制的,绝对的) made without condition; absolute; unreserved
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unconventional
Detail    speak
a. Syn. uncommon; unorthodox
(非传统的) not conforming to accepted rules or standards
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unconvincing
Detail    speak
a.
(不足以令人相信的) not such as to convince or to impress seriously
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uncover
Detail    speak
v. Syn. reveal; expose; disclose
(发现,揭示) remove the cover from; expose; disclose
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underestimate
Detail    speak
v. Syn. undervalue
(低估,看轻) make too low an estimate of the quantity; undervalue
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undergraduate
Detail    speak
n.
((尚未取得学位的)大学生) university student who has not yet received a first degree
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underground
Detail    speak
a. Syn. subterranean; buried
(地下的,地面下的) under the level of the ground; buried
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underlying
Detail    speak
a. Syn. fundamental; implicit
(根本的,在下面的,潜在的) lying under or beneath something; basic; implicit; taking precedence; prior
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undermine
Detail    speak
v. Syn. weaken
(破坏) weaken by wearing away base or foundation; injure or impair; dig a mine or tunnel beneath
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underneath
Detail    speak
ad.
(在下面) under or below an object or a surface; lower down on the page
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undertake
Detail    speak
v. Syn. embark; assume
(从事,承担) take on; embark on; assume
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