名词
中文翻译：品种组合
同义词：
['breeding combination', 'breeding line', 'genetic combination']
例句：
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1. The breed combination of the cattlehas greatly improved the efficiency of farming.
这种牛的品种组合大大提高了农业的效率。
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2. Thebreed combination of the cattle has greatly improvedthe efficiency of farming.
这种牛的品种组合大大提高了农业的效率。
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3. The breedcombination of the cattle hasgreatly improved the efficiency of farming.
这种牛的品种组合大大提高了农业的效率。