大学英语单词-独山在线

大学英语单词表

本单词表包含15328条英汉词条，帮助你背诵记忆。

ultrasonic [ 'ʌltrə'sɔnik ] n. 超声波
e.g. 1. The doctors gave him an ultrasonic brain scan.
医生给他做了脑部超声波扫描检查。
2. An instrument that in a painless and noninvasive manner uses the differential transmission and reflection of ultrasonic waves to create a detailed visual image of the brain.
超声波心动描记器一种用来显示详细的大脑图象的仪器，利用超声波发送和反射的差异来测试并无伤无痛

ultrasound [ 'ʌltrəˌsaund ] n. 超声
e.g. 1. Diagnostic imaging in which ultrasound is used to visualize an internal body structure or a developing fetus.
超声波扫描术利用超声波来显示耳体结构或胚胎发育情况的诊断用的成像法

ultraviolet [ 'ʌltrə'vaiəlit ] a. 紫外线的
e.g. 1. They use ultraviolet lamp to kill pests.
他们使用紫外线灯杀死害虫。
2. Enhancing the effects of or inducing a toxic reaction to light, especially to ultraviolet light.
光中毒的加强光的有毒反应影响的，或引起光的有毒反应的，尤指紫外线的光线

umbrella [ ʌm'brelə ] n. 伞
e.g. 1. The wind blew my umbrella inside out.
风把我的伞吹得翻过去了。
2. You should take an umbrella just as a precaution.
你该带把伞，有备无患。

umlaut [ 'umlaut ] 元音变音
e.g.

UN United Nations 联合国
e.g.

unable [ 'ʌn'eibl ] a. 不能的,不会的
v. 不能,不会
e.g. 1. I am unable to cycle to school because my bicycle is broken.
我不能骑车上学，因为我的自行车坏了。
2. We are as yet unable to say when the train will arrive.
我们还说不上火车什么时候到达。

unacceptable [ 'ʌnək'septəbl ] a. 不能接受的
e.g. 1. Such behavior is unacceptable in a civilized society.
这样的行为在文明社会里是不能接受的。
2. The theory he put forward at the meeting was entirely at fault and was therefore unacceptable.
他在会上提出的理论完全不可靠，因此是不能接受的。

unaffected [ ˌʌnə'fektid ] a. 不矫揉造作的,自然的,不装饰的
e.g. 1. She felt her works are meaningful when she saw the unaffected delight of the children.
当她看到孩子们自然流露出的喜悦时，她感到自己的工作很有意义。
2. These rights are unaffected by the new laws.
这些权利不受新法规的影响。

unaffordable a. 买不起的
e.g.

unaided [ 'ʌn'eidid ] a. 未受协助的
e.g. 1. The baby cannot sit unaided she has to be propped up on pillows.
那婴儿还不会坐--得让她倚著枕头才行.
2. An optical instrument that uses a lens or a combination of lenses to produce magnified images of small objects, especially of objects too small to be seen by the unaided eye.
显微镜用一个透镜或一些透镜的组合来制造小物体的放大形像的视力工具，通常用来观察肉眼看不到的物体

unanimous [ ju(:)'næniməs ] a. 全体一致的,一致同意的
e.g. 1. The committee were unanimous that the application should be turned down.
委员会一致同意拒绝这项申请。
2. Politicians from all parties were completely unanimous in condemning his action.
所有党派的政治家们都一致谴责他的行为。

unassigned [ 'ʌnə'saind ] 未赋值的
e.g.

unattached [ 'ʌnə'tætʃt ] a. 未订婚的,未结婚的
e.g. 1. Not in love or married; unattached.
未婚的没有谈恋爱或未结婚的；未婚的
2. An unattached body cell, such as a blood or lymph cell.
活细胞孤立的身体细胞，例如血球细胞、淋巴细胞

unattended [ 'ʌnə'tendid ] a. 无随员的,无侍从的,无伴的
e.g. 1. Telephone shrilled unattended in deserted office.
在空无一人的办公室里电话铃突然地发出刺耳的尖叫声。
2. An unattended fire.
没有注意的火灾

unauthorized [ 'ʌn'ɔ:θəraizd ] 非法的,越权的
e.g. 1. A term applied to a computer system, spaces, or operating procedures when considering the protection of data from corruption or unauthorized access.
为了加强数据的保护，防止非法的存取，用于评价计算机系统、存储空间和运行过程完整程度的一种指标。
2. Containing information, the unauthorized disclosure of which poses the gravest threat to national security.
绝密极其保密的信息，任何不经许可的揭密都会对国家安全造成最严重的危胁

unavailable [ 'ʌnə'veiləbl ] a. 得不到的,不近便的,不能利用的
e.g. 1. I'm afraid Mr. Smith is unavailable now.
对不起，史密斯先生现在不在。
2. Her manuscript is unavailable.
[美]她的稿件不拟采用。

unavoidable [ 'ʌnə'vɔidəbl ] a. 不可避免的
e.g. 1. The blame is unavoidable.
责备是不可避免的。
2. Something, such as corrective discipline or punishment, that is unpleasant but necessary or unavoidable.
（喻）药某种令人不快的但却必需的或不可避免的东西，例如矫正性惩罚

unaware [ 'ʌnə'wɛə ] a. 没有发觉的,不知道的
e.g. 1. He drove into the ditch completely unaware.
他不知不觉地把车开进了沟里。
2. They attacked him unaware when he was reading.
他们趁他看书不注意时袭击了他。

unbearable [ ʌn'bɛərəbl ] a. 无法忍受的
e.g. 1. The heat outside is unbearable.
外面的高温真让人难以忍受。
2. He is unbearable when he's in a bad temper.
他发脾气时让人无法忍受。

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