A third threat to the mix is the ratcheting up of emissions legislation in almost every important car market as governments struggle to meet ambitious carbon-reduction targets.

• 混合销售的第三个威胁是，随着各国政府争相达到减少二氧化碳排放的宏伟目标，几乎每一个重要的汽车市场都就汽车尾气排放进行了越来越多的立法。