someone who takes part in an activity in which they move quickly around buildings and objects in a city while performing jumps and other skilful movements

London's South Bank is full of skateboarders, BMX riders, breakdancers and free runners.

He is a freerunner — a practitioner of parkour, a supercool mixture of street sports and acrobatics. 他是一名自由跑者，也就是跑酷运动的练习者。跑酷是一种融合了街头运动和杂技的超酷的运动形式。