The key for the eighty-year-old professor to keep fit is to jog three kilometres every morning.
这位八十高龄的教授保持身体健康的关键就是他每天早上慢跑三公里。
The key for the eighty-year-old professor to keep fit is to jog three kilometres every morning.
这位八十高龄的教授保持身体健康的关键就是他每天早上慢跑三公里。
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