I hope you don't mind me stopping in like this, without an appointment.

我希望你别介意我这样冒昧拜访，都没有事先约定。

《柯林斯英汉双解大词典》

I hope you don't mind me calling in like this, without an appointment.

希望您不会介意我这样没有预约就来访。

youdao

I'm happy to meet you. I'm sorry to call on you without an appointment.

很高兴见到您。冒昧来访，十分抱歉。考试吧论坛。

youdao

I'm happy to meet you. I'm sorry to call on you without an appointment.

很高兴见到您。冒昧来访，十分抱歉。考试吧论坛。

youdao