backchat

例句：

1. 1. She replied to the message with a smile.
   她用微笑回复了这条消息。
2. 2. He responded to the question with a confident tone.
   他自信地回答了这个问题。
3. 3. They often chat back and forth during their lunch break.
   他们在午休时经常互相聊天。