介绍了用一步法、两步法合成甲基环戊二烯三羰基锰的过程，影响收率的主要因素。

The one step and the two steps used in the synthesis of MMT and their advantage and shortcoming are described.

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甲基环戊二烯三羰基锰（MMT）对机动车排放及排放控制系统的影响一直是人们争论的焦点。

The effects of methylcyclopentadienyl manganese tricarbonyl(MMT) fuel additive on emission and emission control system of vehicles have ever been the focus of dispute.

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