所有的新汽车都加无铅汽油。

All new cars take unleaded petrol.

《牛津词典》

汽车排放的尾气严重污染了达卡的空气，随着无铅汽油的出现略改善了空气的质量，但是有毒的一氧化碳气体依旧存在着。

Dacca's air is burdened by vehicleemissions; air quality improved after the advent of unleaded gasoline, but toxins such as carbon monoxide persist.

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为适应汽油无铅化及汽车排气净化装置的要求，开发出了高铬铸铁排气阀座。

In order to be suitable for the leadfree gasoline and meet the demand of automotive exhaust gas equipment, exhaust valve seat made of high-chromium cast iron is developed.

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