4000 Duolingo Vocabulary List

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n. tự nhiên biologist knowledgeable about natural history

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a. hải quân relating to, or adjacent to the sea; relating to marine shipping or navigation

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n. thương lượng discussion intended to produce an agreement

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n. [___] a colorless, odorless gaseous element that gives a red glow in a vacuum tube

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a. du mục leading a wandering life with no fixed abode; changeable; unsettled

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n. thê lương không phù hợp failure to conform; lack of harmony or correspondence

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n. Tiêu chuẩn convention; standard; rule

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v. lưu ý observe carefully; notice; show; indicate

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n. người mới beginner; person new to a field or activity

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n. phiền toái something that annoys or gives trouble and vexation; something that is offensive or noxious