| 单词 | 改良品种 |
| 释义 | 〔grade〕To improve the quality of (livestock) by crossbreeding with purebred stock.改良品种：与纯种家畜杂交来改良（家畜）品质〔grade〕A domestic animal produced by crossbreeding one of purebred stock with one of ordinary stock.改良品种：一种家畜，由一个纯种家畜和一个普通家畜杂交得到〔breed〕To cause to reproduce, especially by controlled mating and selection:改良品种：尤指通过人工交配和选种，使…再生：〔upgrade〕To improve the quality of (livestock) by selective breeding for desired characteristics.改善品质，改良品种：通过为得到所希望的特征而进行的有选择的交配而改善（牲畜）的品质〔culture〕The breeding of animals or growing of plants, especially to produce improved stock.养殖：对动物的饲养或植物的种植，尤指为了产生改良品种 |
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