third cousin

例句：

1. 1. He is the third cousin of my sister's husband.
   他是我姐姐丈夫的堂表兄弟。
2. 2.They are third cousins once removed, so they have a distant relationship.
   他们曾经是远房亲戚，所以他们关系疏远。
3. 3.The third cousin of the president has been invited to attend the wedding.
   总统的堂表兄弟被邀请参加婚礼。