【简答题】When you run, you put force that is equal to three times your body weight on your feet. The human foot contains twenty muscles(肌肉). This means that there is a lot that can go wrong when you run. Most ...
【简答题】When you run, you put force that is equal to three times your body weight on your feet. The human foot contains twenty muscles. This means that there is a lot that can go wrong when you run. Most spor...