民事习惯的特性和功能，决定了民事习惯与民法典的密切关系。
The characteristics and functions of civil custom decide the close relationship between the civil custom and the civil code.
他们以及支持者说这项在周一的诉讼是首次挑战日本民事法典中对姓氏要求的诉讼。
They and their supporters say the lawsuit filed on Monday is the first to challenge the surname requirement in Japan's civil code.
新婚夫妇可以最少用两年的时间，来决定是否巩固还是终止婚姻关系，有计划地改变该市的民事法典。
Newlyweds would take a minimum of two years before deciding whether to cement their relationship or split up, under plans to alter the city's civil code.
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