They were designed to give misleading emissions levels.

他们所给出的排放水平含混不清。

10 engines are manufactured for testing purposes, and the emission level of each is determined.

为测试目的制造了 10 台发动机，并确定了每台发动机的排放水平。

He told Reuters news agency that while the agreement represents an important " milestone, " it does not represent the end of efforts to reduce emission levels.

他对路透社表示，尽管该协议代表着一个重要的" 里程碑" ，但并不代表减排努力的终点。

Reports suggest that Volkswagen and American officials have reached a deal under which the carmaker could offer to buy back up to half a million cars in the US that exceed illegal emission levels.

报道称，大众汽车与美国官员达成协议，该汽车制造商将召回美国境内出售的超过非法排放水平的50万辆汽车。