n a farewell remark
interj. 再见
1. I waved goodbye to my friends as they left the party.
我向我的朋友们挥手告别，当他们离开聚会时。
2. It's hard to say goodbye when you have to move to a new city.
当你必须搬到一个新城市时，说再见是很困难的。
3. After a long conversation, we finally said goodbye.
经过长时间的交谈，我们终于说了再见。