Fragen über die Beispielsätze mit, und die Definition und Benutzung von "Curving"

A: × Curving turn used to belon to only alpine ski racer, who entried GL, GS competitions, but thanks to the revolution of ski, ordinary skiers come to enjoy it easily.
✓ Carving turns used to be only for alpine ski racers | elite pro skiers | in GL, GS competitions, but thanks to revolutionary new ski technology, ordinary skiers have started to enjoy it too. || ordinary skiers can easily enjoy it too.

My brother said the exact same thing. He bought new skis for the first time in decades and said it's totally changed the game. ⛷️

A: × Curving turns are the key word in the morden ski.
✓ Curving turns are the key words in modern skiing.

× All intermediates long for the technique.
✓ All intermediates long to perfect the technique.