English version

proving ground

From Longman Dictionary of Contemporary Englishproving groundˈproving ground noun [countable]  1 EXAM/TESTa place or situation in which something new is tried or testedproving ground for High-crime areas are proving grounds for new police officers.2 TT technical an area for scientific testing, especially of vehicles
Examples from the Corpus
proving groundWarrior robots, juggernauts, and land raiders used the jungles as a proving ground.The position required no athletic ability, but traditionally has served as a proving ground for Mississippi politicians.Special projects are also an excellent proving ground.It was a great proving ground.Chicago was becoming an influential proving ground for bands like Smashing Pumpkins.All others are graduates of the Gold Coast Pro-Am Circuit, a summertime proving ground for aspiring tour players.
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