I regret to have made your acquaintance so late.

识荆恨晚。

《新英汉大辞典》

It gives me great pleasure to have all of you here this evening and to make your acquaintance and become friends.

非常高兴能在今晚结识在座各位。

youdao

And if you're worrying that you won't have anything to ask, I heard a very socially savvy friend ask an acquaintance what fillings he liked most in his sandwiches.

如果你担心你没有什么好问的，我听一位在社交方面非常有悟性的朋友曾问他的朋友，问他最喜欢在三明治里夹什么。

youdao

What type of card do you send to a friend, acquaintance, or someone you admire when you hear they have a terminal illness and are going to die?

FORBES: Hallmark, Where Are The Hospice Cards?

You might have to do this a few times with the most dense people on your acquaintance list.

FORBES: Just Schedule It Already!