1.ubiquitous：a. 普遍存在的

We were plagued by the ubiquitous mosquito.我們被無處不在的蚊子所困擾。

2.ulcer：n. 潰瘍

3.ulterior：a. 1.隱秘的2.別有用心的

She definitely had an ulterior motive in offering to help.她主動(dòng)提出幫忙, 肯定有不可告人的動(dòng)機(jī)。

4.unabashed：a.不害羞的

His trousers fell down but he appeared quite unabashed.他的褲子掉了下來, 可他卻顯得滿不在乎。

5.unassuming：a. 不愛表現(xiàn)的，謙虛的

Despite his position, he has an unassuming personality.雖然有地位, 但他為人謙遜。

6.unbecoming：a. 1.不適合的2.不得體的

Although not illegal his conduct was unbecoming for a lawyer.他的行為雖不違法,卻與其律師身份不相稱。

7.uncanny：a.異乎尋常的，出乎意料的

His powers of observation were uncanny.他的觀察能力非常驚人。

8.unceremonious：a. 不拘禮節(jié)的

On the stage, you could make an unceremonious presentation在舞臺(tái)上，你可以隨意地表現(xiàn)。

9.uncouth：a. 粗野的，無教養(yǎng)的

To a Japanese, spilling anything is uncouth.對(duì)日本人來說, 潑濺任何東西都是不文明的。

10.underachieve：v. 成績(jī)不理想

The case for choice is appealing:by allowing parents to send their children to any school in any neighborhood, underachieving schools will be forced to shape up.任意選擇[學(xué)校]的主意很討好：允許父母送子女到任何住宅區(qū)里的任何學(xué)校，可以逼迫成績(jī)落后的學(xué)校改進(jìn)。

（責(zé)任編輯：liushengbao）