gift exchange
短语词组
- reciprocity or gift -exchange models 互惠或投桃报李模型
- gift exchange game 礼物交换博弈;实验;博弈
- Office Supplies Gift Exchange 办公用品礼品交换
- Gift Exchange World 礼物交换世界
- Gift Exchange District 礼品兑换区
- gift exchange model 投桃报李模型
- Presentation and Gift Exchange 中美方交换纪念品
- gift exchange theory 理论 返回 gift exchange