Premolars 前磨牙
Premolars are teeth found between the canines and the molars in adults.
There are usually four premolars in the top row and four in the bottom row of teeth.
Premolars have flat surfaces with ridges, which help in crushing and tearing food.
These teeth often have two points, making them different from the sharp canines and the flat molars.
When people eat, premolars break down big pieces of food before the molars finish chewing.
Without premolars, it would be harder to eat foods like apples or carrots.
前磨牙是成年人犬牙和磨牙之间的牙齿。
通常上下各有四颗前磨牙。
前磨牙表面平坦且有突起，可以压碎和撕开食物。
这些牙齿一般有两个尖头，形状既不像犬牙那样尖，也不像磨牙那么平。
吃东西时，前磨牙先把较大的食物块咬碎，再由磨牙彻底咀嚼。
如果没有前磨牙，像苹果或胡萝卜这样的食物会很难咬断。
配套练习✍️ premolar /ˈpriːˌmoʊ.lɚ/
🔍 完形填空（Cloze Test）
-
Premolars are placed ______ the canines and molars in your mouth.
（a. in front of b. between c. behind） -
Most adults have ______ premolars in total.
（a. eight b. five c. twelve） -
Premolars help break big pieces of food into ______ parts.
（a. wet b. small c. colorful） -
The top of a premolar tooth is usually ______ with ridges.
（a. flat b. sharp c. smooth） -
It would be ______ to eat hard foods without premolars.
（a. easy b. heavy c. hard）
✅ 选择题（Multiple Choice）
-
What is a main job of premolars?
A) To brush teeth
B) To crush and tear food
C) To grow gums -
How are premolars different from molars?
A) They are farther back
B) They are flat and have many points
C) They are sharper and a bit smaller -
When do premolars help most?
A) When you hum
B) When you dance
C) When you eat hard food
✏️ 填空题（Fill in the Blanks）
-
Premolars work together with ______ to chew food well.
（可选答案：molars, lips, eyes） -
Adults have ______ premolars on the bottom row.
（可选答案：four, six, two） -
Premolars have a flat surface with small ______.
（可选答案：ridges, dots, holes） -
Eating ______ can be tough without premolars.
（可选答案：apples, water, books）
练习答案✅
完形填空
- b. between
- a. eight
- b. small
- a. flat
- c. hard
选择题
6. B) To crush and tear food
7. C) They are sharper and a bit smaller
8. C) When you eat hard food
填空题
9. molars
10. four
11. ridges
12. apples
📌文章CEFR 等级：A1级
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