Use "proving ground" in a sentence
1. It is now the south-east tracking station for the United States Air Force Eastern Test Proving Ground
La base est devenue la station de poursuite du Sud-Est pour le polygone d'essais de l'US Air Force (Est
2. It is now the south-east tracking station for the United States Air Force Eastern Test Proving Ground.
La base est devenue la station de poursuite du sud-est pour le polygone d’essais de l’US Air Force (Est).