名词
中文翻译：牙齿的深度
同义词：
['tooth depth', 'tooth height', 'tooth width', 'tooth span']
例句：
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1. The dentist needs to know the exact depth of the tooth before performing the extraction.
牙医需要知道牙齿的具体深度，才能进行拔牙。
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2. The patient's teeth were so worn down that they could barely touch each other.
病人的牙齿磨损得如此严重，以至于几乎无法相互触碰。
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3.The dentist advised the patient to have a dental implant placed to restore the lost tooth depth.
牙医建议患者植入一颗牙来恢复失去的牙齿深度。