复数：backcrosses 现在分词：backcrossing 过去分词：backcrossed
1.〔遗〕回交杂种
2.〔遗〕反交;回交
1.〔遗〕回交,逆代杂交
1.a hybrid obtained by backcrossing organisms
2.the act or the process of backcrossing organisms
1.to cross an organism, especially a hybrid, with one of its parents or an individual genetically identical to that parent
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