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五个月的小儿,从体格上来说,发育是很快的,到五个月末时,体重是出生时的两倍。神经精神方面的发育也很快,细心的父母将会注意到,孩子在运动
Five-month-olds, physically speaking, develop very fast and by the end of the five-month period they are twice as old as they were born. Neuropsychiatric development is also fast, attentive parents will notice that children are exercising