报名参加最近的一项跑步比赛之后，你就会因此受到激励，紧盯目标坚持不懈地去训练。
By signing up for a race in the near future, you will focus on a goal and be motivated to keep practicing for that event.
铁人三项是一项比赛，每位选手需要完成长距离的游泳、骑自行车和跑步项目。
Triathlon is a race in which each person swims, rides a bicycle and runs over very long distances.
他热爱运动，并且想在铁人三项中挑战自己，而铁人三项是一项包含4公里游泳、180公里骑行和42公里跑步的运动比赛。
He loves sport and wants to challenge himself in triathlon—a sports competition in which people swim 4 kilometers, bike 180 kilometers and run 42 kilometers.
他热爱运动，并且想在铁人三项中挑战自己，而铁人三项是一项包含4公里游泳、180公里骑行和42公里跑步的运动比赛。
He loves sport and wants to challenge himself in triathlon—a sports competition in which people swim 4 kilometers, bike 180 kilometers and run 42 kilometers.
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