They believe that half an hour is enough to stop young and healthy people from feeling tired.
他们认为半小时的睡眠足以让年轻人和健康的人不再感到疲劳。
Doctors say that napping for about an hour may be too long for young and healthy people.
医生说,对年轻人和健康的人来说,一个小时左右的午睡时间可能太长了。
Walk. You're young and healthy.
走路吧,你这么健康这么年轻,以后也会把。
And he says skateboarding is giving young people some healthy competition in the inner cities of the United States.
VOA: special.2009.09.11
One study involved sixty-eight healthy young women and men who ran at least twenty-four kilometers a week.
VOA: special.2010.02.03
For example,young children grow crops in a school garden and learn about healthy eating.
VOA: special.2010.01.21
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