replying to a letter 回复信件
replying quickly 快速回复
replying via email 通过邮件回复
A: Why are you so quiet?
A：你怎么这么安静？
B: I am replying to many messages.
B：我正在回复很多信息。
1) 回复中
2) 回答
3) 回应
1. 回复；回答
verb
1. answering or responding to someone or something
Synonym: responding