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At first I could run for only two minutes, but I built up my endurance.
起初我只能跑两分钟，但我的耐力得到了加强。
youdao
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How to run in a short time to improve endurance and speed?
怎样在短时间内提高跑步耐力和速度？
youdao
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How to run in a short time to improve endurance and speed?
怎样在短时间内提高跑步耐力和速度？
youdao