I am writing to apologize for...

我为……之事写信道歉。

youdao

I am writing this letter to apologize to you for the mistake I made in the work.

特此写这封信给您，对我在工作中所犯的错误向您道歉。

youdao

I am writing this note to apologize to you for my failure to visit your city and join you as promised.

我给你写信的目的是想向你道歉，我没有按说好的去参观你生活的城市，没有去拜访你。

youdao

I am writing this note to apologize to you for my failure to visit your city and join you as promised.

我给你写信的目的是想向你道歉，我没有按说好的去参观你生活的城市，没有去拜访你。

youdao