| 单词 | bull index |
| 释义 | bull indexnoun : a measure of the relative ability of a dairy bull to transmit desirable qualities to his daughters obtained by comparing the productivity of a certain number of daughters with that of their dams |
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英语词典包含469781条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。