片语
de GraafDe Graaf is a Dutch occupational surname. In modern Dutch de graaf means the count, but in the past it also referred to the head of the municipal council called schepe
gerichte graaf有向图
Henry Graaf标签
Van de Graaf generator范德格拉夫发电机
Valerie van der Graaf格拉芙
graaf van埃格蒙特伯爵
digraafgerichte graaf有向图
Magdalena graaf马格达雷娜·格拉芙
Graaf f伯爵