N-COUNT If you describe a place as a proving ground, you mean that new things or ideas are tried out or tested there. 试验场
New York is a proving ground today for the Democratic presidential candidates.
今天的纽约是民主党总统候选人的试验场。
But some drivers embrace the technology, which came free for those who offered their cabs as proving grounds.
但是有些出租车司机对这种科技表示欢迎。他们被免费提供了这样的系统，作为测试。
These tests were performed at the US Army Dugway Proving Grounds under a contract with the Office of Naval Research.
这些试验完成的美国陆军达格威靶场根据与美国海军研究办公室的合同。
Organize off side proving grounds which fit the requirements of the overall vehicle test plan (e. g. skid pad, high speed oval course, handling course…) .
组织合适的外部试验场开展整车试（如：动态广场，高速环道，操控道等）
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