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| 说起刷牙,一般我们都以为就是为了防止蛀牙(cavities)然而,新的研究显示,刷牙可真的不仅仅是为了你的牙齿好,口腔卫生做的不好还会伤到你的肺(lungs)这都要说到你口腔里的微生物群(microflora),你不好好刷牙就可能让它们发生些危险的变化,而这些变化会顺着你的呼吸道(respiratory tract)入侵你的肺,进而让你更可能患肺炎(pneu http://www.24en.com/p/257766.html | |
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| 英语作文:关于沙尘暴:The city's meteorological observatory issued a white warning sign Thursday indicating the city's weather could be influenced by a tropical sand storm in the next two days.The meteorological ob... http://www.joozone.com/tg/802815.html | |
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| 英语作文:壮不努力,老大徒伤悲:“少壮不努力,老大徒伤悲”,请你谈谈对此的想法并如何行动。 Almost everyone knows the famous Chinese saying:A young idler,an old beggar. Throughout history,we have seen many cases in which this s... http://www.joozone.com/tg/802816.html | |
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