incisor

名词切牙，门齿

1. 门牙：刘中锋在这方面的天赋(genius)丝毫不弱于他在枪械方面的能长着狐狸脸的那个司机就象做了一个屈体动作,脸朝下地扑向人行道,摔断了的门牙(incisor)都飞了出去.

2. 门齿：在自然分类系统中啮齿动物属哺乳纲(Mammalia)啮齿目,最主要的形态特征为上、下颌各有1对锄状门齿(incisor),无犬齿(canine),取代犬齿的位置是齿隙(diastem).

3. 切牙：牙(teeth)人体中最坚硬的器官,有咬切、撕裂、研磨食物及协助发音等功能. 人一生有两副牙:乳牙(milk teeth)在出生后约半岁左右开始萌出,两岁半左右出齐,共20个. 7~12岁,乳牙先后脱落牙式(dentition) 根据牙的形态和功能,可分为用以咬切食物的切牙(incisor用以撕裂食物

4. 门齿,切齿：哺乳动物的牙齿由于在切咬、咀嚼上的分工,分化为门齿(切齿)(incisor)、犬齿(canine)、前臼齿(premolar)和臼齿(molar). 门齿为切断食物之用,犬齿为刺穿和撕裂食物之用,前臼齿和臼齿为研磨食物之用. 由于同一种兽的牙齿形状和数目相同,

1. 门牙
    Your incisors are the teeth at the front of your mouth which you use for biting into food.

1. National Zoo staff also noted that the cub now has upper and lower incisor and canine teeth.

2. incisor的解释

2. The scan also showed he had the overbite characteristic of other kings from his family, large incisor teeth and his lower teeth were slightly misaligned.

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