4000 Duolingo Vocabulary List

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a. ngày old-fashioned; obsolete

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a. thập phân of tens; numbered or proceeding by tens; based on ten

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n. suy giảm change toward something smaller or lower; gradual falling off from a better state

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a. dứt khoát final; complete; precisely defined or explicit

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v. chứng minh show clearly and deliberately; manifest; confirm; prove

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n. phá hủy havoc; event that completely destroys something

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a. tàn phá destructive; highly critical; causing or capable of causing complete destruction

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a. kỹ thuật số of or performance to fingers, or to digits; done with the fingers

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n. thất vọng feeling of dissatisfaction

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n. cuộc điều tra formal essay;  paper written by a candidate for the doctoral degree at university