Children of all ages should be outdoors several hours a day.
各个年龄段的孩子每天都应户外活动几个小时。
outdoors详细解释
out.doors adv.(副词)In or into the open; outside:在户外:在露天;在外面:例句:walking outdoors for fresh air.走到露天呼吸新鲜空气 n.(名词)The open air.户外An area away from human settlements.远离人类居住地的地区