选择了目标，就可以为自己划分出不同的距离，从要跑15秒到要跑90秒的距离，并且根据距离来调整自己的步伐。
Make choices that mark off different distances so your pickups vary in length from 15 to 90 seconds, and modify your pace to match the distance.
在线大学最好的地方是你可以根据你自己的步伐来学习。
The great thing about the online college is that you can study at your own pace.
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