In one experiment, nearly 200 participants boarded a double-decker bus for a tour of Philadelphia.
在一项实验中，近200名参与者登上一辆双层巴士游览费城。
2
One such patient is Eric Decker who had had bariatric surgery at Cincinnati Children's four years ago when he was 17 years old.
其中一个患者就是埃里克，四年前在他17岁的时候于辛辛那提儿童医院完成了治疗手术。
3
The company's 164 trams, including two open-balcony trams for tourists and private hire and one special maintenance tram, make up the world's only fully double-decker tram fleet.