4000 Duolingo (C) - Spelling Practices

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(1) n. hiệu chuẩn adjustment; the process of checking a measuring instrument to see if it is accurate

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(2) a. Hồng y chief; serving as an essential component

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(3) v. phân loại classify; put people or things into groups with the same features

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(4) v. tụng utter with a melodious voice; celebrate in song; make melody with the voice

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(6) n. đồng associate; partner; either of two matching objects

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(7) v. buộc force; coerce; necessitate or pressure by force

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(8) n. biến chứng complexity; intricacy; any disease or disorder that occurs during the course of another disease

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(9) n. tụ lens used to concentrate light on an object; an apparatus that converts vapor into liquid

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(10) v. nhầm lẫn cause to be unable to think with clarity or act with intelligence or understanding; mix up