名词
中文翻译：门牙
同义词：
['incisor', 'canine', 'premolar', 'molar']
例句：
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1. The molar teeth are the first set of teeth to come in when a baby is born.
乳牙是婴儿出生时最先长出的牙齿。
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2. The molar teeth are responsible for grinding and breaking down food.
磨牙负责咀嚼和分解食物。
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3. The molar teeth are also important for speech because they help form the tongue's muscles.
磨牙对发音也很重要，因为它们帮助形成舌头的肌肉。