The laboratory has become a testing ground for ideas about the origins of the universe.实验室成了有关宇宙起源说的测试场地。Her class served as a testing ground for new teaching methods.她所在的班级是新教学法的试验基地。Eastern Europe has been a testing ground for rapid economic reform.东欧成为了快速经济改革的试验场。Eastern Europe has become a testing ground for high-speed privatization.东欧已经成为高速私有化的试验场。