1. What is the proper warm-up for a good leaf season? 什么是适当的热身了一个良好的叶季节？
2. Neither. I prefer to use the stationary bike for my warm-up. 都不是。我比较喜欢用踏步机（固定式脚踏车）作暖身。
3. This way, you can practice the appropriate starts, turns and sprints in the warm-up. 这样，你可以练习一下正确的出发和转身并作一下热身的短冲。
英英解释
n.
1. exercising in preparation for strenuous activity
2. run until the normal working temperature is reached
3. become more friendly or open
4. get warm or warmer
5. cause to do preliminary exercises so as to stretch the muscles
6. make one's body limber or suppler by stretching, as if to prepare for strenuous physical activity
