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英语单词“incisor”的意思是：门牙，上颚牙。读音为英 [ɪnˈsaɪs] 美 [ɪnˈsaɪs]。例句如下：
1. He bared his teeth in a smile, revealing his incisors, which were slightly yellow. 他露出牙齿微笑，露出了有点发黄的门牙。
2. She had a gap between her front teeth and wore braces to correct them, revealing her incisors. 她的门牙之间有缝隙，为了矫正她戴着牙套，露出了门牙。
3. She had a chipped incisor and a scar on her chin. 她有一颗门牙有缺口，下巴上还有一道疤痕。
4. I accidentally bit into my own incisor when I was trying to chew a piece of hard candy. 我试着嚼一块硬糖时，不小心咬到了自己的门牙。
5. His lower incisors were extremely sharp and had left numerous puncture wounds on my arms and legs. 他的门牙非常锋利，在我胳膊和腿上留下了许多牙印。
6. The incisors of the lower jaw are usually more prominent than those of the upper jaw. 下颌的门牙通常比上颌的门牙更突出。
7. She had a gap between her upper and lower incisors that made her look younger than she was. 她的门牙之间的缝隙让她看起来比实际年龄小。
8. When she opened her mouth to speak, the sunlight glinted off her shiny incisors. 她张开嘴说话时，阳光在她光亮的门牙上闪烁。
9. When I told her my name, she revealed an overgrown incisor that had been broken off at the gum line. 当我告诉她我的名字时，她露出一颗在牙龈线上断裂的过长的门牙。
10. He had a gap between his upper and lower incisors that made him look like a child even though he was over 30 years old. 他的门牙之间有缝隙，让他看起来像个孩子，尽管他已经30多岁了。
总的来说，“incisor”这个单词在口语和书面语中都经常使用，它描述的是我们口腔中的一对尖锐的、通常呈切割状的牙齿。
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