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
慢跑三公
。
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慢跑三公。
：
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