The herd size is what makes pastoralism a bit economical, but once the herd size shrinks it becomes really uneconomical.
让游牧很经济的是畜群规模，但是一旦畜群规模缩小，游牧就会变得相当不划算。
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。
"Nature controls the size of the herd," says Mathis's brother, Nils Peder.
“自然界在控制着鹿群的大小，”马特·希斯的兄弟尼尔斯·皮德尔说。
In South Africa the size of your car and your herd of cattle is what seems to count.
而在南非，你对自己乘坐的汽车车型和自家家畜数量也得小心。
The structure and the size of the herd are important for the function of the grazing ecology systems.
结构和规模是影响草地放牧生态系统功能实现的重要因素。
He will not seek a job in cities this year, believing that helping his father expand the size of their herd will be more rewarding.
他今年不打算进城找工作了，觉得帮父亲扩大养殖规模更有前景。
The result of the entire procedure is that a farmer can increase the size of a herd of cows at a rate which was previously impossible.
整个过程的结果就是农民能够以先前不可能有的速度增加其牛群的数量。
Some technical measures were used in the breed control of Hequ horse, such matters as defining conservation region, determining effective population size and having a right foundation herd etc.
河曲马品种的保种与选育，应采取划定保护区，建立育种核心群，确定群体有效含量，控制近交，调整马群结构和合适的公母比例等措施；
Some technical measures were used in the breed control of Hequ horse, such matters as defining conservation region, determining effective population size and having a right foundation herd etc.
河曲马品种的保种与选育，应采取划定保护区，建立育种核心群，确定群体有效含量，控制近交，调整马群结构和合适的公母比例等措施；
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