![Wespendaboutone-thirdofourlivesasleep.Thismaysoundlikea...]( "Wespendaboutone-thirdofourlivesasleep.Thismaysoundlikea...")
- 問題詳情：Wespendaboutone-thirdofourlivesasleep.Thismaysoundlikealotoftime，butitisnotwasted.Ourbodiesneedsleeptostayhealthy.Notgettingenoughsleepcanmakeussick.Sleepandourimmune(免疫)systemTheimmunesystemprotectsthebodyfromdiseasesandinfections(傳染).Not...
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