名词短语
中文翻译：牛犊系统
同义词：
['cattle-to-calf operation', 'dairy herd management']
例句：
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1. Thecow-and-calf system is a common method of milk production in many countries.
牛犊系统是许多国家常见的牛奶生产方法。
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2. In the cow-and-calf system, the cows are raised for their milk and then sold as calves.
在牛犊系统中，奶牛被饲养以产奶，然后作为小牛出售。
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3. The cow-and-calf system is an effective way to manage large herds of dairy cows.
牛犊系统是一种有效管理大量乳牛群的方法。