Now lets do the same calculation for USA subtracting all pigs imported from Canada from USA slaughter total and then divide by U. s breeding herd.

现在让我们对美国也做同样的计算，减去从加拿大进口和从美国屠宰的全部猪的总数，然后除以美国种猪群体数。

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We simulated the impacts of breeding herd size, reproductive skew and numbers of breeding stags on the inbreeding coefficient of Père David's deer.

模拟分析了繁殖群体大小、繁殖偏倚和占群优势雄性数目对麋鹿的有效种群大小的影响。

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Dr. Russel is creating an elite herd by cross-breeding goats from around the globe.

罗素博士正在通过使来自世界各地的山羊杂交而创造一种精品羊群。

《柯林斯英汉双解大词典》

Dr Brunton looked at the number of chicks fledged per nest in the colony she was observing and discovered that, contrary to the selfish-herd theory's predictions, pairs breeding near the edge of the colony were more successful than those at its centre.

ECONOMIST: Animal behaviour

Mr Davies was well-known for breeding prize-winning Friesian cows but had sold his 50 to 60 strong herd during the last two years to people restocking after foot-and-mouth.

BBC: Villagers talk of shootings 'shock'