Level 4 - 3 - Spelling Practices

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(1) n. [堆,堆积,大量] crowd or throng; a great number of persons; pile or mass

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(2) n. [拥挤] a large group or crowd; wandering troop or gang; a moving crowd

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(3) n. [氢] a nonmetallic univalent element that is normally a colorless and odorless, highly flammable diatomic gas

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(4) n. [卫生] the degree to which people keep themselves or their environment clean; sanitation

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(5) n. [消化不良] a disorder of digestive function; difficulty in digesting

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(7) n. [核心的] central or vital part; most material and central part; grain or seed as of corn

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(8) n. [饰带,花边] delicate decorative fabric woven in an open web of symmetrical patterns; rope; cord that is drawn through eyelets

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(9) n. [家畜,牲畜] any animals kept for use or profit

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(10) n. [神经元,神经细胞] a cell that is specialized to conduct nerve impulses