"say goodbye."的意思是：说再见，作别。
单词解释：
say
英 [seɪ] 美 [se]
vt. 讲；说明；例如；声称；假设；指明
vi. 讲；表示；念；假定；背诵
n. (Say)人名；(土)萨伊；(法、老、柬)赛；(英)塞伊；(匈、罗)绍伊
goodbye
英 [gʊd'baɪ]
int. 再见；告别
例句：
1、But now I have to say goodbye.
但是现在我必须得跟你说再见了。
2、Don't foget to say goodbye to others before hang off.
别忘了在挂断电话之前要与对方说再见。
3、As the emotions move through you, they will slowly lose their potency, and you will be ready to say goodbye to your ex and move on to a happy, healthy new relationship.
那你经历这些情绪的时候，他们的力量会慢慢减弱，你就可以和旧爱说再见，迎接一段幸福、健康的新感情。
4、Reluctant to say goodbye to the past sweet as we are, our efforts are unavailing.
心中再有不舍，不忍心和过去的甜蜜说再见，也于事无补了。
5、She was going to say goodbye when Leonard said, “Sorry.
她正要说再见时，伦纳德开口说：“对不起。
扩展资料
近义表达：take leave 告别；休假
单词解释：
take
vt. 拿，取；采取；接受（礼物等）；买，花费；耗费（时间等）
vi. 拿；获得
n. 捕获量；看法；利益，盈益；（入场券的）售得金额
leave
vt. 离开；留下；遗忘；委托
vi. 离开，出发；留下
n. 许可，同意；休假
例句：
1、Under the scheme, parents would not usually be able to take leave simultaneously.
根据这项计划，父母通常不能同时休假。
2、Very quietly I take leave, As quietly as I came here. Quietly I wave good-bye, To the rosy cloudsin the western sky.
轻轻的我走，正如我轻的来。我轻轻的招手，作别西天的云彩。
3、Yue not the cluster see things here and take leave, three people immediately put blue phoenixsend linghu chong and yue buqun return together.
岳不群见此间事了便告辞而去，三人当即放了蓝凤凰送令狐冲和岳不群一起回来。
4、Fly Xu of confusing thoroughly take leave with me.
飞絮的迷离与我彻底告别。
5、He instructs the archangel Gabriel to go down and tell the president that it is time for him to takeleave of his people.
他命令天使长加百列下凡去告诉总统先生他该向他的人民告别了。
“说再见”
goodbye 英[ˌgʊdˈbaɪ] 美[ˌɡʊd'baɪ]
n. 再见;
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[例句]Why don't you say goodbye?
为什么不跟他说再见？本回答被提问者和网友采纳
也是一首歌的名字