結果 : how many hours sleep 5 6 year old

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1:31

How much sleep do kids really need?

CBS News
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1:19

How many hours of sleep do you need?

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How much sleep do you really need? | Sleeping with Science, a TED series

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6:18

How Many Hours of Sleep Do Children Need?

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9:21

Science Explains How Much Sleep You Need Depending on Your Age

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Is 6 hours of sleep enough?

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What Would Happen if You Only Got 5 Hours of Sleep Per Night - NOT GOOD!

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Doctor Explains Why You DON’T Need 8 Hours Sleep!

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What Happens To Your Body When You Sleep 4-6 Hours vs 7-10 Hours

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Not enough sleep may harm children’s developing brains

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What Happens to Your Body on Little Sleep?

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