A group of organisms having common ancestors and certain distinguishable characteristics, especially a group within a species developed by artificial selection and maintained by controlled propagation.

 
  • 属一群拥有共同祖先和明显特征的有机体,尤指属于同一物种的一群,通过人工选择来发展,通过有控制的繁殖来维持
今日热词
目录 附录 查词历史