好奇为什么 · 4-8 岁

为什么要睡觉

身体和大脑的夜班

科普启蒙约 5 分钟4-8 岁中英双语

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晚上，小宝还在搭积木桥，妈妈却拉上窗帘：“到睡觉时间啦。”小宝不舍地问：“为什么每天都要睡觉？”

At night, Xiaobao was still building a block bridge when Mama closed the curtains. "Time for bed." Xiaobao asked, "Why do we have to sleep every day?"

晚上，小宝还在搭积木桥，妈妈却拉上窗帘：“到睡觉时间啦。”小宝不舍地问：“为什么每天都要睡觉？”

At night, Xiaobao was still building a block bridge when Mama closed the curtains. "Time for bed." Xiaobao asked, "Why do we have to sleep every day?"

钻进被窝后，小宝又问：“睡觉时，大脑会像灯一样关掉吗？如果关掉了，梦又从哪里来呢？”

After climbing into bed, Xiaobao asked, "Does the brain switch off like a lamp during sleep? If it does, where do dreams come from?"

妈妈说：“睡眠不是关机。大脑仍然活跃，还会经过不同的睡眠阶段，整理白天学到的事，帮助重要的记忆变得更稳。”

Mama said, "Sleep is not a shutdown. The brain stays active and moves through different sleep stages, organizing what you learned and helping important memories grow stronger."

“深睡时，促进生长的一些重要信号会更活跃，身体也会修补白天跑跳留下的细小损耗。”

"During deep sleep, important signals that support growth become more active, and the body repairs tiny wear from the day's running and jumping."

“充足睡眠还帮助免疫系统有条理地工作，让身体更好地应对每天遇到的病菌。”

"Enough sleep also helps the immune system work in a coordinated way, so the body can respond better to germs it meets each day."

“睡得够，第二天更容易集中注意、调节情绪；睡得太少，就更容易走神，也可能变得急躁。”

"With enough sleep, it is easier to pay attention and manage feelings the next day. Too little sleep can make us distracted or irritable."

第二天早晨，小宝精神十足。他想起昨晚没搭稳的地方，很快让积木桥稳稳站住了。

The next morning, Xiaobao felt refreshed. He remembered what had made the bridge wobble and soon built it so it stood firmly.

早餐刚摆好，小宝的肚子忽然咕噜作响。他摸摸肚皮，又有了新问题：“肚子为什么会咕咕叫呢？”

As breakfast was served, Xiaobao's tummy suddenly rumbled. He patted it and asked a new question: "Why does my tummy growl?"

睡眠不是让大脑关机；它帮助大脑整理和巩固记忆，也支持身体修复与生长、免疫协调和情绪调节。

Sleep does not switch the brain off. It helps the brain organize and strengthen memories while supporting body repair and growth, immune coordination, and emotional regulation.

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