名词
中文翻译：牙齿
同义词：
['dent', 'jawbone', 'gum']
例句：
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1. She had a toothache and went to the dentist for treatment.
她牙疼，去看了牙医治疗。
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2. The old lady has lost all her teeth due to old age.
这位老太太因为年老失去了所有的牙齿。
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3. He was biting his nails because he had no teeth left.
他咬指甲是因为他的牙齿都掉了。