名词
中文翻译：门牙
同义词：
['upper teeth', 'upper incisors']
例句：
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1.She had a chipped upper tooth that needed to be fixed.
她有一颗上颌的牙齿断了，需要修复。
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2.The dentist advised her to visit the clinic for an examination of her upper teeth.
牙医建议她去看诊所检查她的上颌牙齿。
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3. The child's upper teeth were stained from eating too much sugar.
这个孩子因为吃太多糖而上颌的牙齿变黄了。