名词
中文翻译：奶牛指数
同义词：
['cow count', 'cow population index', 'dairy herd index']
例句：
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1. The cow index is a crucial indicator of the health and productivity of a dairy farm.
奶牛指数是衡量奶牛农场健康和生产力的关键指标。
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2. In this study, we used the cow index to analyze the impact of climate change on dairy production.
在这项研究中，我们使用奶牛指数来分析气候变化对奶制品生产的影响。
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3. The cow index was calculated based on the number of cows in each region, which helped us to betterunderstand the distribution of dairy resources.
奶牛指数是根据各地区的奶牛数量计算得出的，这有助于我们更好地了解奶源分布情况。