under this particular category
Under this particular category, the most important document is your son's birth certificate because it proves the relationship between the petitioner， in this case, your son, and the applicant, yourself.
基于1个网页-相关网页
under this particular category
在这个特殊类别下
以上为机器翻译结果，长、整句建议使用 人工翻译 。