As the start gun goes off, all the athletes jump into the water to swim nearly a mile. Then, they quickly dry off and hop onto their bikes for a 25-mile ride. Finally, they change once more and hit the pavement for a 6.2-mile run. Eventually, the athletes that cross the finish line can proudly tell their family and friends that they just completed an Olympic distance triathlon.
Why would anyone want to swim, bike, and run all in one race? The answer dates back to France in the 1920s. An event called Les Trois Sports, or the Three Sports, saw athletes pushing themselves to be the best they could be in more than one field. The first modern triathlon was held in Mission Bay in San Diego, California in 1974. Now, there are a number of organizations that put on triathlons around the globe. Athletes that compete in triathlons want to maintain their physical fitness. Triathletes also believe that training for three events is better than for only one. Since the exercises are rotated during training, there is less chance of injury. In addition, swimming and biking have less of an impact on the athletes' bodies than running on a regular basis.
枪声一响，所有选手跳入水中游将近一英里。然後，
他们很快地把身体擦乾，跳上他们的自行车骑二十五英里。最後，他们再次地更换衣服，开始六点二英里的赛跑。最终，越过终点线的选手可以自豪地告诉他们的家人和朋友，他们完成了奥运远距铁人三项比赛。
怎麽会有人想在一个比赛里同时游泳、骑自行车和跑步呢？这个答案可追溯到1920年代的法国。在一项称为Les Trois Sports（法文，三项体育）或是三项运动的赛事中，可以见到选手们在不只一项的领域里尽力表现自己最好的一面。第一届现代铁人三项比赛於1974年在加州圣地亚哥市的米申湾举行。现在，有若干组织会在世界各地筹办铁人三项比赛。参加铁人三项比赛的选手都想维持自己的体能。铁人三项比赛的运动员也认为，训练三项赛事优於单项。由於在训练的过程中练习的项目一直轮流交替，因此受伤的机会较小。此外，游泳和骑自行车对运动员身体的冲击比经常跑步来的小。
go off发出声响
Marshall was late because his alarm clock didn't go off.
马歇尔因他的闹钟没响所以迟到了。
dry off变乾
I went to lie in the sun to dry off after swimming in the ocean.
我在海里游完泳後到太阳底下晒乾。
hit the pavement开始走路，上路
It is getting dark, so I'd better hit the pavement.
天色渐渐变暗了，所以我最好马上上路。
eventually adv. 最终，终於
Eventually, the couple broke up.
这对情侣最终还是分手了。
put on...举行 演出（活动，节目等）
The TV station put on a concert to raise money for the typhoon victims.
电视台举行了一场演唱会为台风受灾户募款。
compete vi. 竞争
A total of six players competed in the second round of the tournament.
共有六位选手竞争第二回合的锦标赛。
maintain vt. 保持，维持
That Japanese restaurant maintains a high level of service at all times.
那家日本餐厅总是保持高水准的服务品质。
on a regular basis定期地，固定地
My best friend Lindsay and I hang out after school on a regular basis.
我放学後固定和我最好的朋友琳赛一起玩。
athlete n. 运动员
triathlon n. 游泳、脚踏车和赛跑三项运动的全能赛
rotate vt. 轮流
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