8339.upbringing(名)教養
After a very proper upbringing, he chose to lead the Bohemian life of an artist．
他受過正統的教育，卻立志過著藝術家我行我素的生活。

8340.upgrade(動)升級
Organizations may suddenly need to upgrade servers．
各單位可能突然會需要對服務器升級。

8341.uphold(動)支持
同義詞support
Eight columns uphold the big dome．
8根柱子支撐著這個大圓頂。

8342.uplift(動)振奮、鼓舞
His soul was uplifted by the music.
音樂使他的精神振奮了起來。

8343.uproot(動)根除
Windows were broken and large trees were uprooted．
窗被打碎，大樹被連根拔起。

8344.uranium(名)鈾
The isotope of uranium with mass number 235，had fission with slow neutrons．
鈾的同位素，原子質量數為235，與慢中子發生裂變。

8345.urine(名)尿
When was the urine sample collected?
尿樣本是什么時候收集的？

8346.utensil(名)用具
This store sells cooking utensils.
這商店出售炊具。

8347.utility(名)效用、實用
The store deals in objects of domestic utility.
那家商店出售家庭用品。

8348.utilize(動)利用
Scientists are trying to find more efficient ways of utilizing solar energy．
科學家正在尋找能更有效地利用太陽能的方法。

8349.vaccinate(動)給……接種
后接介詞against
Has your child been vaccinated against smallpox?
你的小孩接種牛痘疫苗了嗎？

8350.vaccine(名)疫苗
Salk vaccine is a "killed" vaccine．
沙克疫苗是一種不會傳染的疫苗。

8351.vacuum(名)真空
We could not pull apart two plates which enclosed a vacuum．
如果兩個盤子間是真空，我們就無法將它們分開。

8352.vague(形)模糊的
Everything looked vague in the heavy fog．
在濃霧中，一切東西看起來都很模糊。

8353.vaguely(副)模糊地
I vaguely remember their house.
我依稀記得他們的房子。

8354.valid(形)有效的
同義詞effective
The ticket is valid for one month.
這張票在一個月內是有效的。

8355.validity(名)正當、確實
We should question the validity of those figures．
我們應當查詢那些數字的正確性。

8356.valve(名)閥、活門
The exhaust valve on my car has burnt out three times．
我車子上的排氣閥已燒壞三次了。

8357.vanity(名)虛榮心
He did that to gratify his girlfriend's vanity．
他做那事是要滿足他女友的虛榮心。

8358.vanquish(動)擊敗
Government troops have vanquished the rebels.
政府軍已經擊敗了叛亂分子。

8359.vapor(名)蒸氣
A cloud is a mass of vapor in the sky．
云是天空中的一團水氣。

8360.velocity(名)速度
The velocity of light is about 186OOO miles per second．
光速大約是每秒十八萬六千英里。

8361.vengeance(名)報仇
Herbert swore vengeance on the murderers of his father．
赫伯特發誓要向謀殺他父親的兇手們報仇。

8362.verdict(名)裁定
The jury brought in a verdict of guilty．
陪審團裁定有罪。

8363.vertical(形)垂直的
The northern side of the mountain is almost vertical.
這座山的北側幾乎是垂直的。

8364.vessel(名)容器
Cups,basins, pots,bottles, casks, etc, are vessels that hold liquids.
杯、盆、罐、瓶、桶等都是盛液體的容器。

8365.veteran(名)老兵
John was a veteran of many battles.
約翰是個身經百戰的老兵。

8366.veto(名)否決權；禁止
The Presidpnt threatened to use his veto over the bill.
總統威脅要對這個議案行使否決權。

8367.vibration(名)振動
Your finger can feel the vibration on the violin string.
你的手能感覺到小提琴琴弦的振動。

8368.vicinity(名)附近
There is no high school in the vicinity.
這附近沒有高中。

8369.vicious(形)惡毒的
I won't listen to such vicious remarks．
我不想聽這種惡毒的話。

8370.victim(名)犧牲者
The victims of the explosion were buried last week．
爆炸事故的犧牲者于上周舉行了葬禮。

8371.victimize(動)使痛苦
I was victimized the whole evening by his loquacity.
整個晚上他的吵鬧不休都使我痛苦不已。

8372.vigor(名)活力
The leader of the expedition must be a man of great vigor.
探險隊的負責人必須是有活力的人。

8373.vigorous(形)精力充肺的
The nest held three vigorous young birds.
這窩里有三只精力充沛的小鳥。