我不得不谢绝他的邀请，因为我另有约会。

I had to decline his invitation because I had another appointment.

youdao

我恐怕不得不谢绝你的邀请。

I am afraid I have to decline your invitation.

youdao

我恐怕不得不谢绝你的邀请。

I'm sorry, I have to decline. I.

youdao

我恐怕不得不谢绝你的邀请。

I'm sorry, I have to decline. I.

youdao