你可以选择从游泳到骑马等各种活动。
大约600名美国运动员将参加30个不同项目的比赛——从游泳到击剑，从柔道到体操。
About 600 U.S. athletes will compete in 30 different sports at the Games—from swimming to fencing, and from judo to gymnastics.
他们的许多工作都归结于测量——从游泳运动员跳水的准确角度，到自行车运动员每秒的动力输出。
A lot of their work comes down to measurement—everything from the exact angle of a swimmer's dive to the second-by-second power output of a cyclist.
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