Small groups of hooded protesters hurled fire bombs and torched public transit bus.
一小群蒙面抗议者投掷燃烧弹，焚烧公交巴士。
Transit bus
原声例句
NPR音讯 2013年7月合集
AP 听力 2015年7月合集
A New Jersey Transit bus rear-ended a private bus carrying Canadian school children inside the Lincoln Tunnel.
新泽西州巴士后部与一辆私家车相撞，事故发生在林肯隧道，车上载有加拿大学校儿童。
中文百科
公共汽车
公共汽车是一种以中型或大型汽车（大客车/巴士）作为运送手段，以运输大量乘客的的大众运输服务。
公共汽车在中文地区中的名称不尽相同。
英语百科
Transit bus 公共巴士
A transit bus (also commuter bus, city bus, stage bus, public bus or simply bus) is a type of bus used on shorter-distance public transport bus services which include low-floor buses, double-decker buses, articulated buses and midibuses.
These are distinct from all-seated coaches used for longer distance journeys and smaller minibuses, which are typically used for paratransit (demand-responsive) services.