A mole rat's incisor teeth can move on their own, working together like chopsticks.
鼹鼠的门牙可以自行移动，像筷子一样共同工作。
Incisor tooth
原声例句
国家地理（儿童专栏）
日常生活医学科普
All eight of our incisor teeth are located in the front part of our mouth.
我们所有的八颗门牙都位于口腔的前部。
日常生活医学科普
Whenever we sink our teeth into something, such as an apple, we use our incisor teeth.
每当我们咬东西的时候，比如一个苹果，我们就用我们的门牙。
中文百科
门齿 Incisor
（重定向自Incisor tooth）
门齿 (Incisor) 是异齿型哺乳类动物的第一类牙齿。
不少草食性和杂食性的哺乳类，诸如人类和马匹，均需以门齿来切断食物。而肉食性动物，诸如猫科和犬科动物，牠们的门齿较少，会以犬齿和裂齿来切碎食物。大象的门齿已演化为长牙，而啮齿目诸如老鼠等动物，牠们的门齿会不停生长，因此会以啃东西来磨短门齿。
英语百科
Incisor 门齿
（重定向自Incisor tooth）
Incisors (from Latin incidere, "to cut") are the front teeth present in most heterodont mammals. They are located in the premaxilla above and on the mandible below. Humans have a total of eight (two on each side, top and bottom). Opossums have 18, whereas armadillos have none.
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