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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)
同根詞：urea（n.尿素）
2.utensil n．用具，器皿(implement)
詞根記憶：ut（用）+ensil--用品--器皿
3.utilize v.利用，使用(to make use of)
詞根記憶：ut(用)+ilize--利用
例：The system was originally utilized by the Chinese laborers who had preceded the Japanese.
派生詞：utility(n．功用；[常pl.]公用事業)
4.vacant a．空著的，未占用的(empty)
詞根記憶：vac(空)+ant（…的）--空著的
例：In any given day, one-fourth of all community beds are vacant.
派生詞：vacancy(n．空閑；空缺)
5.vaccinate v.接種疫苗(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)
詞根記憶：vaccin（牛痘）+ation--接種牛痘--接種疫苗
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)
詞根記憶：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)
詞根記憶：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真空吸塵器
9.vague a．模糊的，含糊的(obscure)
詞根記憶：vag(游移)+ue--游移不定的--模糊的
例：The confusing movie had a rather vague ending.
派生詞：vaguely( ad.含糊地，不明確地)
