For instance, California enacted the zero-emissions-vehicle (ZEV) program mandating automakers to claim ZEV credits for a small percentage of total vehicle sales starting in 2003.是什么意思_For instance, California enacted the zero-emissions-vehicle (ZEV) program mandating automakers to claim ZEV credits for a small percentage of total vehicle sales starting in 2003.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句