每位参加该研究的人员平均每周检查四次，每人每次平均运动约40分种。

On average, participants worked out nearly four times per week, with each workout lasting for about 40 minutes.

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其肘部和腕部运动的平均运动完成率很高(TMR患者为96.3%，对照组为100%)。

The average motion completion rate for elbow and wrist movements was high (96.3 percent for TMR patients and 100 percent for control participants).

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把适度的锻炼，比如瑜伽或高尔夫球计算在内，体重正常的男性和女性平均运动时间接近每周两到四个小时。

When moderate exercise, like yoga or golf, were counted, normal weight men and women averaged closer to two and a half to four hours a week.

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So, the average velocity may not tell you the whole story.

平均速度可能无法描述整个运动过程

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For example, if you started here and you did all this and you came back here, the average velocity would be zero, because you start and end at the same value of x, you get something; 0 divided by time will still be 0.

例如,如果你从这里开始运动,经过这个过程又回到这里,平均速度就是0,因为初态和末态的位移相同,你得到了什么呢,0除以时间还是0

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