Objective To investigate the sanitation status of guest rooms of Guangzhou city star hotels and improve the air quality and sanitary condition of public facilities.
目的了解广州市星级宾馆客房的卫生状况，提高客房内空气及公共用品用具的卫生质量。
This website shows you the status of the Air Quality in Beijing!
本网站向您展示了北京的空气质量状况！
The Air Pillow can stop activity of cerebral cortex during sleeping and come into resting status, thereby it improve quality and effect of sleeping.
气枕能使大脑皮层细胞活动不活跃，进入休眠的状态，从而提高睡眠质量和效果。
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