Schlüsselfigur; Hauptfigur
wichtiger Bahnhof; Großbahnhof; Hauptbahnhof
main parts; main components
primary business; primary function; primary focus
major newspaper; leading newspaper; widely circulated newspaper
Hauptpunkt; wichtiger Punkt; Kardinalpunkt (ein Kardinalelement)
Hauptfaktor; Hauptursache
prices of staple commodities
key customers; key customer; major clients; major client
major histocompatibility complex; MHC