柯林斯词典catalytic converter (catalytic converters) 1. N-COUNT A catalytic converter is a device which is fitted to a car's exhaust to reduce the pollution coming from it. 催化轉化器 返回 catalytic converter剑桥词典a device on a car that reduces the amount of poisonous gas that is released from the exhaust （汽車上的）催化式排氣淨化器 返回 catalytic converter