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古代传说，龙生有九子，九子不成龙，各有所好。比喻同胞兄弟品质、爱好各不相同。
明 徐应秋《玉芝堂谈荟龙生九子》：“龙生九子不成龙，各有所好。”
龙生九子作主语、宾语、定语；用于兄弟等比较。
The dragon has nine sons and each of them is different from the other.
