今天,为国家睡眠基金会的睡眠挑战注册!
Sign-up for the National Sleep Foundation's Sleep Challenge today!
国家睡眠基金会称损坏的床垫是导致背痛的原因之一。
The National Sleep Foundation claims that a worn-out mattress is one of the back pain culprits.
国家睡眠基金会2005年的调查报告显示,近四分之一的美国夫妇或分室或分床而睡。
Nearly one in four American couples sleep in separate bedrooms or beds, the National sleep Foundation reported in a 2005 survey.
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