在布拉格举行的FMX自由式摩托车越野赛活动中，摩托车车手的身姿映衬在阳光下。
Riders are silhouetted against the sun as they perform on motorcycles during FMX Jam, a freestyle motocross event, in Prague.
尼克：项目是不少，不过大体分为四类：摩托车场地赛，摩托车公路赛，摩托车旅行赛，摩托车越野赛和多日赛。
Nick: there are many events. However, there are generally four types: track race, road race, travel race, cross-country race and multi-day race.
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