unleaded fuel的用法和样例：
例句
- Governments have tinkered with fiscal reform for decades for targeted problems, such as landfill space or unleaded fuels.
几十年来，政府已对像填埋空间，无铅燃料等问题实施了财政改革。 - Catalytic converters reduce carbon monoxide,oxides of nitrogen,and volatile organic compounds in emissions and necessitated the use of lead-free fuel.
催化转炉减少了一氧化碳，氧化氮和挥发性有机混合物等的排放，而且无铅燃料的应用也当成为必要。
