优先日期一般是申请人的亲属或雇主代表申请人正式向美国移民局递交移民签证申请的日期。

The priority date is generally the date when the applicant's relative or employer properly filed the immigrant visa petition on the applicant's behalf with USCIS.

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确保某些孩子未满18岁的父母在申请父母签证的时候是由孩子的亲属或者孩子的配偶担保而不是一位所谓的近亲。

Enable certain applicants for parent visas who are parents of children under 18 to be sponsored by 'relative' of the child or 'relative' of the child's spouse rather than a 'close relative';

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