To establish(a child born out of wedlock) as legitimate by legal means.

他们不知道这孩子是不是婚生的。

youdao

Some British media agencies have been scathing in their coverage of Mr. Zuma's polygamy and the recent news of his 20th child, born out of wedlock.

一些英国媒体在报道中严厉批评了祖马的一夫多妻制和未婚生育的第20个孩子。

youdao

Some British media agencies have been scathing in their coverage of Mr.Zuma's polygamy and the recent news of his 20th child, born out of wedlock.

VOA: standard.2010.03.03

We know as well that a child born out of wedlock is more likely to experience poverty and lack an adequate education.

CNN: Obama, Rubio speeches: Highs and lows