the most advanced or innovative part of something
der fortschrittlichste oder innovativste Teil von etwas (der fortschrittlichste oder innovativste teil von etwas)
"This new design is at the cutting edge of architecture."
"Dieses neue Design ist am Vordersten der Architektur." (dieses neue design ist am **vordersten** der architektur)
to pass something to someone of a later generation
to continue working even when you are tired or out of energy
to copy something with little change
to direct all your attention and efforts toward one thing
to join an activity or discussion quickly
don't make plans for something that might not happen