Level 2 - 3 - Spelling Practices

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(1) n. [tầng điện ly] the outer region of the Earth's atmosphere

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(2) a. [hàng đầu] chief; principal; having a position in the lead; foremost

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(3) a. [tự do] open-minded; tolerant; broad-mindedness; having political views favoring reform and progress

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(4) a. [sinh lợi] profitable; producing a good profit

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(5) n. [quyển từ] the magnetic field of a planet

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(7) n. [tưởng niệm] monument; short note or abstract, intended for a registry, exhibiting the particulars of a deed

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(8) a. [tối ưu] most advantageous; optimum; ideal

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(9) a. [tối ưu] most favorable or advantageous

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(10) v. [làm tê liệt] make powerless and unable to function; disable