...前庆祝它的160th 周年纪念, 学校将主持美国牙齿教育协会(ADEA), 2005 年国际协会为牙齿研究(IADR) 并且美国协会为牙齿研究(AADR) 在他们的会议上在巴尔的摩。
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还有另外两种研究对印第安人的起源提供了一些线索；它们包括对牙齿和语言的研究。
There are two other kinds of research that have thrown some light on the origins of the Native American population; they involve the study of teeth and of languages.
这项研究警告孩子说不要吃太多巧克力，因为这可能毁掉他们的牙齿。
The study cautioned children against eating too much chocolate, which may destroy their teeth.
在她父亲的允许下，她用接下来的两年时间在网上进行调查研究，并进行实验。最后研制出既美味又不伤牙齿的食谱。
With her dad's permission, she spent the next two years researching online and conducting trials to get a recipe that was both tasty and tooth-friendly.
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