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封闭群
anim.husb. closed colony; closed flock
封闭群一生物群(或畜群)不与外界混杂，只在本群进行随机交配，呈现一定程度的基因平衡，此生物群称为闭锁群或封闭群
anim.husb. close population; closed population
封闭群: 23 phrases in 5 subjects
Agriculture5
Animal husbandry3
Earth sciences1
Electronics9
Telecommunications5

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