Itsnormalforthehuman的精选

问题详情：根据下面短文内容,在短文的空格处填上一个恰当的词,使短文完整、通顺。It'snormalforthehumanmindtowander(走神).Somanythingsmayfillyourmindandpullyourthoughtsindifferentdirections.Thisisn'talways...