by the bye

例句：

1. 1. Bye! I'll see you later.
   拜拜！我稍后见。
2. 2. Bye! Have a nice day.
   拜拜！祝你今天愉快。
3. 3. Bye!Take care and don't forget to lock the door.
   拜拜！小心点，别忘了锁门。