名词短语
中文翻译：牙齿的根部
同义词：
['root of the tooth', 'root of the jawbone', 'root of the gums例句：1. The dentist removed the old filling and replaced it with a new one.（牙医移除了旧填充物，并用新的替换了它。）']
例句：
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1. The dentist removed the old filling and replaced it with a new one.
牙医移除了旧填充物，并用新的替换了它。
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2.The patient's root of the tooth was infected and needed to be treated.
患者的牙齿根部感染了，需要治疗。
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3. The roots of the teeth are visible when you smile.
当你微笑时，可以看到牙齿的根部。