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教练:
If you want to tone up your legs, I recommend using the treadmill. 
如果想锻炼腿部.我推荐你使用跑步机.
佛瑞斯特:
Thanks. Is there anything that I should pay attention to?
谢谢.应该注意些什么?
教练:
Yeah, there are several things. First of all, you'd better start with a low speed.
嗯.有几件事情需要注意.首先.最好从慢速开始.
佛瑞斯特:
Yeah, I see.
嗯.我明白.
教练:
Drink some water every 15 minutes and don't use the treadmill more than four times a week.
每十五分钟就喝一次水.还有每周使用跑步机的次数不要超过四次.
佛瑞斯特:
Ok, thanks.
知道了.谢谢!