名词
中文翻译：牛
同义词：
['cow', 'herd', 'cattle', 'flock']
例句：
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1. The farmer has a large herd of cows in his farm.
这位农场主拥有他农场里一大群牛。
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2. The cows graze on the lush green grass.
这些奶牛在郁郁葱葱的草地上吃草。
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3. Cows are an important source of milk and meat for human consumption.
奶牛是人类消费牛奶和肉类的重要来源。