现在,对于鸟类以外的动物来说,父母双方都照顾孩子在动物界是很罕见的。
Now, for animals other than birds, the care of young by both parents is pretty unusual in the animal kingdom.
有关侧化的一些研究的概述:在动物界中,身体一侧对其他生物的支配通常是由一只脚、一只眼睛,甚至是一根触角来完成的。
An overview of some research into lateralisation: the dominance of one side of the body over the other creatures across the animal kingdom have a preference for one foot, eye or even antenna.
在动物界,这个正是进化进程的正常方式。
In animals, at least, this is the way evolution normally proceeds.
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