在动物世界里,单亲家庭是一种较为普遍的“社会现象”,在这些单亲家庭里,担当起抚育儿女重任的也往往是那些看起来很柔弱娇小的母亲,而父亲则很少担负这个责任,它们在繁殖后代的过程中所做的贡献往往只是交配、授精而已,完成了这一过程以后,它们就会扬长而去,再也不履行作为父 In the animal world, single-parent families are a relatively common “social phenomenon.” In these single-parent families, those who are responsible for taking care of children are often mothers who seem to be tender and petite, while fathers rarely take on this responsibility. The contribution they make in breeding offspring is often only mating and insemination. After this process is completed, they will grow and they will no longer perform as fathers.