ultimatum [`ʌlti’meitəm]
n. 最后通牒
例句1, The government issued an ultimatum to the rebels, demanding their immediate surrender.
政府向叛军发出了最后通牒,要求他们立即投降。
例句2, Faced with the ultimatum, the company had no choice but to comply with the new regulations.
面对最后通牒,公司别无选择,只能遵守新规定。
例句3, The ultimatum from the landlord left the tenants with only a week to vacate the premises.
房东的最后通牒只给了租户一周的时间搬离房屋。
例句4, She gave her partner an ultimatum: either they seek counseling or she would end the relationship.
她向伴侣发出了最后通牒:要么他们寻求咨询,要么她就结束这段关系。
例句5, The CEO’s ultimatum to the board was clear: approve the merger or he would resign.
首席执行官向董事会发出的最后通牒很明确:批准合并,否则他将辞职。

ultraviolet [`ʌltrə’vaiəlit]
a. 紫外(线)的
例句1, Ultraviolet rays from the sun can cause skin damage if you don’t wear sunscreen.
如果你不涂防晒霜,太阳的紫外线会导致皮肤损伤。
例句2, The museum uses ultraviolet light to protect ancient artifacts from fading.
博物馆使用紫外线来保护古代文物免受褪色。
例句3, Scientists have developed a new type of ultraviolet sensor for detecting air pollution.
科学家们开发了一种新型的紫外线传感器,用于检测空气污染。
例句4, The ultraviolet spectrum is invisible to the human eye but can be detected with special equipment.
紫外线光谱对人眼是不可见的,但可以通过特殊设备检测到。
例句5, Certain flowers have patterns that are only visible under ultraviolet light.
某些花朵的图案只有在紫外线下才能看到。

unaided [ʌn’eidid]
a. 无助的;独立的
例句1, The hiker found himself unaided in the wilderness, with no one to help him navigate back to civilization.
这位徒步旅行者发现自己独自一人在荒野中,没有人帮助他返回文明世界。
例句2, She completed the project unaided, demonstrating her ability to work independently.
她独立完成了这个项目,展示了她的独立工作能力。

unanimity [junə’niməti]
n. 无异议,同意,一致
例句1, The board reached unanimity on the decision to expand the company’s operations overseas.
董事会一致同意决定将公司业务扩展到海外。
例句2, The unanimity among the team members was crucial for the project’s success.
团队成员之间的一致意见对项目的成功至关重要。
例句3, There was a rare unanimity in the committee’s vote, reflecting their shared vision for the future.
委员会投票中出现了罕见的无异议,反映了他们对未来的共同愿景。

unbecoming [ʌnbi’kʌmiŋ]
a. 不适合的,不得体的,不相配的
例句1, Her behavior at the formal dinner was unbecoming of a person in her position.
她在正式晚宴上的行为与她的身份不符。
例句2, The candidate’s unbecoming remarks during the debate cost him many votes.
候选人在辩论中的不当言论使他失去了许多选票。
例句3, Wearing such casual attire to a black-tie event is unbecoming and disrespectful.
在正式晚宴上穿如此随意的服装是不合适且不尊重的。
例句4, His unbecoming attitude towards his colleagues made it difficult for him to work in a team.
他对同事的不当态度使他在团队中难以工作。

unbiased [ʌn’baiəst]
a. 没有偏见的
例句1, In order to make a fair decision, the committee sought an unbiased opinion from an external expert.
为了做出公正的决定,委员会向外部专家寻求了没有偏见的意见。
例句2, The journalist was praised for her unbiased reporting on the controversial issue.
这位记者因对争议性问题的没有偏见的报道而受到赞扬。
例句3, An unbiased analysis of the data revealed trends that were previously overlooked.
对数据的没有偏见的分析揭示了之前被忽视的趋势。
例句4, The teacher encouraged students to approach historical events with an unbiased perspective.
老师鼓励学生们以没有偏见的视角来看待历史事件。
例句5, The company implemented an unbiased hiring process to ensure equal opportunities for all candidates.
公司实施了没有偏见的招聘流程,以确保所有候选人都有平等的机会。@

unblemished [ʌn’blemiʃt]
a. 无瑕疵的,无缺点的,无污点的,清白的
例句1, Her unblemished reputation made her the ideal candidate for the prestigious award.
她无瑕疵的声誉使她成为这一 prestigious 奖项的理想候选人。
例句2, The artist’s unblemished canvas awaited the first stroke of inspiration.
艺术家无污点的画布等待着灵感的第一笔。
例句3, His unblemished record of honesty earned him the trust of his colleagues.
他清白的诚实记录赢得了同事们的信任。

uncanny [ʌn’kæni]
a. 怪诞的,可怕的,离奇的,神秘的
例句1, The uncanny resemblance between the two strangers made everyone in the room feel uneasy.
这两个陌生人之间怪诞的相似之处让房间里的每个人都感到不安。
例句2, She had an uncanny ability to predict the outcome of complex situations.
她有一种离奇的能力,能够预测复杂情况的结果。
例句3, The uncanny silence in the forest was broken only by the distant howl of a wolf.
森林里神秘的寂静只被远处狼的嚎叫声打破。
例句4, The uncanny atmosphere of the old mansion sent shivers down his spine.
那座老宅可怕的氛围让他脊背发凉。

unconscious [ʌn’kɔʃəs]
a. 无意识的
例句1, The patient remained unconscious after the surgery, requiring close monitoring in the intensive care unit.
手术后,病人仍然处于无意识状态,需要在重症监护室进行密切观察。
例句2, Her unconscious habits, like tapping her pen on the desk, often distracted her classmates during lectures.
她无意识的习惯,比如在桌子上敲笔,常常在课堂上分散同学们的注意力。

unconsolidated [`ʌnkən’sɔlideitid]
a. 松散的,疏松的
例句1, The unconsolidated soil on the hillside made it difficult to build a stabl

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