observed trials
noun /əbˌzɜːvd ˈtraɪəlz/
/əbˌzɜːrvd ˈtraɪəlz/
[uncountable + singular or plural verb] (also trials riding, trials biking [uncountable])
- the sport of riding a specially designed motorcycle or bicycle through a course that has objects on the ground, which is designed to test a rider's ability
极限骑行运动（使用特制摩托车或自行车，考验骑行者通过障碍物的能力）