你不必回复他的信。

Don't bother about answering his letter.

youdao

进一步说，只是因为它们称之为“即时消息”，但你不必即刻回复！

Further, just because they call it "instant Messaging", you don't have to respond this instant!

youdao

帮助他人的愿望值得赞扬，但如果无法在自己设定的时限内回复所有的请求，塞内·德尔建议人们“不必因此感到愧疚。”

Although your desire to help people is laudable, if you find that you just can't respond to all requests within the time limit you've set for yourself, "don't feel guilty," Cenedella advises.

youdao