古代传说龙生的九条小龙，外貌性情皆有所不同。比喻人各有所好，不全然相同。《通俗编・禽鱼引升庵外集》：“俗传龙生九子不成龙，各有所好。”
英语 The dragon has nine sons and each of them is different from the other.
