used
used/ju:st/ I.v.used to惯常(与不定式连用，否定式为used not或didn’t use疑问句可用used开头，也可用did开头)：He is not what he used to be.他已不是从前的他了。He usedn’t/didn’t use ···
usher
usher/ˈʌʃə/ I.n.［c］（戏院、公共场所等）引座员：The usher seated them in the front row.引座员让他们在前排就座。‖II.vt.1.引导：She ushered us into her office and offered us a ···
usual/usually
usual/ˈju:ʒuəl/adj.平常的，通常的：He did it in a usual way.他用通常的方法做这件事。Heavy traffic is usual at this time.这时交通繁忙是常事。as usual像往常一样，照例：As usual, h···
utensil
utensil/ju(:)ˈtensil/n.［c］器具，用具，器皿（尤指家庭用具）：farming utensils农具；writing utensils文具Pots, pans, kettles and mops are kitchen utensils.锅、盘、壶及拖把是厨房用具···
utility
utility/ju:ˈtiliti/n.1.［u］功用，效用，实用：a utility van实用厢式货车；utility clothes简单实用的衣服2.［c］公用事业(= public utility): Gas and electric companies are public util···
utilization/utilize/utilise
utilization/ˌju:tilaiˈzeiʃən/ n.[u]利用：hydropower utilization水能利用；information utilization情报利用；effective utilization有效利用；resource utilization资源利用utilize/uti···
utmost/uttermost
utmost/uttermost/ˈʌtməust/ I.adj.极度的，最大的，最远的：take the utmost care予以最大的注意；the utmost limits极限；to the utmost ends of the earth到天涯海角；be of the utmost i···
Utopia
Utopia/ju:ˈtəupjə, -piə/n.乌托邦(理想中美好的社会)She was entering the masses with the phantom of a future Utopia.她正用未来的乌托邦幻想来吸引群众。Utopiais an imagined place o···
utter
utterⅠ/ˈʌtə/vt.发出(声音)，说：utter a cry发出叫喊声；utter one’s feelings (thought)用言词表达情感(思想) Not a sound was uttered.一声不吭。utterⅡ/ˈʌtə/adj.彻底的，完全的，···
vacancy/vacant
vacancy/ˈveikənsi/n. [u]&[c]空房间；空虚，空白，空缺，空额：a vacancy for a shorthand typist一个速记打字员空缺；two vacancies in the new building新楼的两间空房The sign outsid···
