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1.urine n.尿(waste material that is secreted by the kidney in vertebrates, is rich in end products of protein metabolism together with salts and pigments, and forms a clear amber and usually Slightly acid fluid in mammals but is semisolid in birds and reptiles)
同根词：urea（n.尿素）
2.utensil n．器具，器皿(implement)
词根影象：ut（用）+ensil--用品--器皿
3.utilize v.应用，运用(to make use of)
词根影象：ut(用)+ilize--应用
例：The system was originally utilized by the Chinese laborers who had preceded the Japanese.
派生词：utility(n．服从；[常pl.]公用奇迹)
4.vacant a．空着的，未占用的(empty)
词根影象：vac(空)+ant（…的）--空着的
例：In any given day, one-fourth of all community beds are vacant.
派生词：vacancy(n．闲暇；空缺)
5.vaccinate v.接种疫苗(to administer a vaccine to usually by injection)
例：Many parents would be more inclined to have their children vaccinated against influenza if the vaccination did not require an injection.
6.vaccination n.接神疫苗(the act of vaccinating)；牛痘疤(the scar left by vaccinating)
词根影象：vaccin（牛痘）+ation--接种牛痘--接种疫苗
例：Many parents would be more inclined to have their children vaccinated against influenza if the vaccination did not require an injection.
7.vaccine n.牛痘苗，疫苗（a preparation of killed microorganisms, living attenuated organisms, or living fully virulent organisms that is administered to produce or artificially increase immunity to a particular disease)
词根影象：vacc(牛)+ine--牛痘苗
例：The new vaccine uses the same mechanism to ward off influenza as injectable vaccines do.
8.vacuum n．真空(a space absolutely devoid of matter)
词根影象：vacu(=vac空)+um--真空
例：Most astronomers believed that the space between the galaxies in our universe was a near perfect vacuum.//vacuum cleaners真空吸尘器
9.vague a．含糊的，模糊的(obscure)
词根影象：vag(迟疑)+ue--迟疑不定的--含糊的
例：The confusing movie had a rather vague ending.
派生词：vaguely( ad.模糊地，不明白地)
