大多数城市的巴士，现在有两个燃烧系统，使双燃料使用。

The majority of the city's buses now have two combustion systems to allow for dual-fuel use.

youdao

大多数城市的巴士，现在有两个燃烧系统，使双燃料使用。

The majority of the city's buses now have two combustion systems to allow for dual-fuel use.

youdao