名词
中文翻译：实际牙齿密度
同义词：
['actual dental density', 'actual dental composition', 'actual dental structure', 'actual dental volume']
例句：
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1. The study found that the actual tooth density of children in urban areas was significantly lower than that of children in rural areas.
研究发现，城市地区儿童的实际牙齿密度显著低于农村地区儿童。
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2. The dentist recommended a new type of filling material to improve the actual tooth density of the patient's teeth.
牙医推荐了一种新类型的填充材料，以改善患者牙齿的实际牙齿密度。
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3. The researcher analyzed the data and found that there was a correlation between the actual tooth density and the child's diet.
研究者分析了数据并发现，孩子的牙齿实际密度与饮食之间存在关联。