有个朋友是单身父亲,最近刚把两岁的小孩通过移民签证带到美国,想给孩子申请公民 。在n-600 Application for Certificate of Citizenship 中有一条: "You are a biological child, you were legitimate, or you were legitimated while in the legal custody of your legitimating parent(s) prior to reaching your 16th birthday; or" 其中的这个关于孩子的legitimacy "you were legitimate"不知道是什么意思?朋友想 交申请表,但又怕关于孩子的legitimate这点没满足条件。我朋友和孩子他妈没有结婚 ,孩子从出生一直由我朋友抚养,在出生公证上孩子的父亲也是我朋友。有懂法律的律 师能帮忙解答一下吗? 万分感谢!