Level 4 - 4 - Spelling Practices

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(1) n. [ô nhiễm] contamination; undesirable state of the natural environment being contaminated

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(2) a. [thực] based on experience; useful

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(3) n. [vọng] advancing of a claim; assertion; a false or unsupportable quality

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(4) n. [protein] any of a large group of nitrogenous organic compounds that are essential constituents of living cells

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(5) n. [giải quyết] determination; resolving to do something; a formal statement of a decision

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(6) n. [giải quyết] determination; formal expression by a meeting; agreed to by a vote

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(7) n. [cách mạng] act of revolving; motion of a body around a fixed point or line; total or radical change in political organization

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(8) n. [cạnh tranh] competition; the act of competing as for a profit or a prize

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(9) n. [screwdriver] a hand tool for driving screws

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(10) n. [scuba] a device that lets divers breathe underwater