英文字典中文字典51ZiDian.com
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xx b.不可分离 b.不可分离 xx adj 1: denoting a quantity consisting of 20 items or units [synonym: {twenty}, {20}, {xx}] n 1: the cardinal number that is the sum of nineteen and one [synonym: {twenty}, {20}, {XX}] 2: (genetics) normal complement of sex chromosomes in a female |
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