The companies are trying to avoid repeating the mistakes of Volkswagen, which covered up its use of so-called defeat devices that could adjust emissions to comply with regulations when a car was being tested, but ease back in normal driving conditions.
这些汽车公司正试图避免重蹈大众的覆辙，即掩盖其使用所谓的失败装置，在汽车测试时调整排放量以符合法规，在正常驾驶条件下则恢复正常。