reciprocal verb

例句：

1. 1. The teacher and the students are reciprocal in their roles.
   老师和学生在角色上是相互的。
2. 2. This is a reciprocal relationship between two companies.
   这是两家公司之间的互惠关系。
3. 3. They exchanged reciprocal gifts to show their friendship.
   他们交换了互惠的礼物来展示他们的友谊。