这两个家族的渊源可追溯到清末的商贸往来。Zhè liǎng gè jiāzú de yuānyuán kě zhuīsù dào Qīng mò de shāngmào wǎnglái.The roots of the relationship between these two families can be traced back to commercial exchanges in the late Qing period.
他们两家渊源很深,祖辈就是好朋友。Tāmen liǎng jiā yuānyuán hěn shēn, zǔbèi jiùshì hǎo péngyǒu.The connection between their two families runs deep; their grandparents were already good friends.
这种习俗的渊源可以追溯到古代。Zhè zhǒng xísú de yuānyuán kěyǐ zhuīsù dào gǔdài.The origins of this custom can be traced back to ancient times.