Ustalf

例句：

1. 1. The Ustalf family has been farming this land for generations.
   乌斯特夫家族世代耕作这片土地。
2. 2. He was a Ustalf, and he knew the secrets of the forest well.
   他是个乌斯特夫，对森林的秘密了如指掌。
3. 3. The Ustalfs were invited to the party, but they declined due to their busy schedules.
   乌斯特夫家被邀请参加聚会，但他们因为繁忙的日程拒绝了。