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 4000 FCE (U - Z) - Spelling Practices
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a. 地下的,地面下的 under the level of the ground; buried


Spelling Word: underground
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a. 失业的 jobless; idle; out of work


Spelling Word: unemployed
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a. 不公平的 unjust; contrary to laws or conventions, especially in commerce


Spelling Word: unfair
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a. 不可预知的 random; difficult to foretell or foresee


Spelling Word: unpredictable
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a. 未被证实的 has not been proved true


Spelling Word: unsubstantiated
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v. 使升级,提升 raise to a higher grade or standard; advance


Spelling Word: upgrade
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a. 笔直的,直立的,柱子,直立物 in an erect position or posture; perpendicular; vertical, or nearly vertical; pointing upward


Spelling Word: upright
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a. 可能变化的,可以改变的 likely to change or vary; subject to variation; changeable


Spelling Word: variable
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a. 巨大的,大量的,范围广的 large; broad; extensive; very great in size, number, amount, or quantity


Spelling Word: vast
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n. 血管,静脉,木纹,矿脉,岩脉 a tube that carries blood to the heart from the other parts of the body  


Spelling Word: vein