虽然这两个变种对于土壤湿度有截然不同的偏好，但混合种群的情况并不少见。
Although the two morphs have distinct preferences for soil moisture, mixed populations are not uncommon.
然而事实却是，在混合种族的社会中，几乎人人都以一滴血降级观念瞄准了相同的少数种群，这是一项很说明问题的指标，表明该现象是可被学习的——而且学习作用还如此强大。
The fact that nearly everyone in a mixed-race society, however, targets the same minority groups for one-drop demotion is a telling indicator that the phenomenon is learned - and powerfully so.
混合遗传算法在产生初始种群时引入启发式方法，采用自适应遗传参数和交替使用两种交叉算子；
In the HGA , heuristic algorithm is used to produced initial population , self-adaptive parameter are used in copy operator, crossover operator and mutation operator .
应用推荐