The choice of nucleotide changes in DNA evolution can be either selectively neutral or biased.
DNA分子进化中，对核苷酸替换的选择可呈选择中性或选择倾向性。
When human beings carry on the information to process, there are some problems of information choice. Especially, in the choice of the emotion information, the biased cognitive operation is obvious.
人类在进行信息加工时都存在信息选择问题，尤其是在对具有情绪意义的信息进行选择时，其偏向作用更为明显。
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