三方缔结的
Concluded by the three parties
以上为机器翻译结果，长、整句建议使用 人工翻译 。
论文从蒙古族宗法性的婚姻形态、缔结原则和成因三方面对此进行了初步探讨。
The following is a kind of elementary exploration into this field from three aspects, namely, patriarchal marital patterns of Monggol nationality, establishment principles and originating reasons.
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