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iamb

英 ['aɪæm(b)] 美 [aɪ'æmbəs]

n. 抑扬格，短长格

英文词源

iamb (n.): 1842, from French iambe (16c.), from Latin iambus, from Greek iambos (see iambic). Iambus itself was used in English in this sense in 1580s.