名词
中文翻译：母牛
同义词：
['cow', 'female cow例句：1. The heifer is a young cow that has not yet reached its full growth.（这头小母牛尚未达到其完全成长。）']
例句：
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1. The heifer is a young cow that has not yet reached its full growth.
这头小母牛尚未达到其完全成长。
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2.The farmer bought the heifer to help with the milking process.
农民买了这头母牛来帮助挤奶过程。
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3.Heifers are often used for breeding purposes in agriculture.
在农业中，母牛经常用于繁殖目的。