I need to talk to such and such about the meeting.
Refers to a person or thing that is not specifically named or identified.
You can ask such and such if you need help.
Used to refer to unspecified people or things in a general way.
It costs such and such to join the club.
Used to indicate a vague or unspecified degree or extent.
I have such and such items to sell.
Used to refer to a particular but unspecified example or type.
Mit dem leistungsstarken kostenlosen Bildwörterbuch und den Fläschkärds.