Stories of USA Today
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 4000 FCE (U - Z) - Spelling Practices
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a. 不能架桥的,不能逾越的 impassable; unable to be bridged or crossed; impossible to span


Spelling Word: unbridgeable
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n. 结合,一致 cohesion; harmony; quality of being united into one


Spelling Word: unity
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v. 维护,支持 support; preserve; hold aloft; raise


Spelling Word: uphold
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a. 都市的 metropolitan;  of, relating to, or located in a city


Spelling Word: urban
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v. 进行预防接种 perform or produce immunity


Spelling Word: vaccinate
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n. 真空 empty area or space; an electrical home appliance that cleans by suction


Spelling Word: vacuum
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n. 通风 act of supplying fresh air and getting rid of foul air


Spelling Word: ventilation
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n. 船,液体容器 craft; ship; container for liquids


Spelling Word: vessel
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a. 挥发的,飞行的,可变的,爆炸的 tending to vary often or widely, as in price; inconstant or fickle; tending to violence


Spelling Word: volatile
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n. 织布者,织工 the craftsman who weaves cloth


Spelling Word: weaver