TEETH A tooth is a bit like a tree — only part of it is visible, and the roots lie beneath the surface. The roots of your teeth extend into your gums and beyond into the jaw bones. Your tooth has many layers.
Dentin is the largest part of your tooth and therefore can often have a very big impact on the perceived whiteness of your teeth. Like enamel, dentin is a combination of calcium and phosphate, but in the form of apatite crystals instead of hydroxyapatite crystals (even though they are in th...
19.sin(72°) Teeth are important parts of our body.If we want to keep our teeth healthy and clean,we should brush teeth at least twice a day.How can we brush our teeth?Of course by using toothpaste and toothbrushes.But do you know the history of toothpaste? About 7,000years ago,Egyp...
A lot of germs live there.Take at least 2 minutes to brush your teeth.第一节 阅读短文,根据语篇内容,在方框内的缩写文章中,填入与短文意思最符合的单词,每空一词。 (每小题1分,共6分)Taking proper care of your teeth The germs can get into your teeth and damage them_2 you brush your The...
teeth 牙齿 tongue 舌头 neck 脖子 shoulders 肩膀 stomach 胃 hips 臀部 arms 胳膊 hands 手 legs 腿 feet 脚 01 head[hed] ⓪【名词】头 02 hair[heə(r)] ⓪【名词】头发(不可数名词) 例句:Aturtlemoves fast in ...
O.011 Spare parts from wisdom teeth? Isolation and characterization of cell populations from human teethServicesFree MovementEuropean UnionDirectiveCroatian national rapporteurs maintain that the Services Directive will have a positive impact on the enforcement of EC free movement of services rules in ...
K25RC 25 Bucket teeth 7.5 PC120 R PC120 side cutter 8 PC120 L PC120 side cutter 8 205-93-97120-40 PC200 Tooth adapter 8.4 5. Our warehouse: 6.Company information Ningbo Beneparts Machinery co., Ltd as your reliable G.E.T parts supplier, offering full range of rep...
①Teeth are very important body parts.You need to take really good care of them because you need to use them in your whole life.Everyone wants to keep their teeth healthy,but not everyone knows how to do it.If you are one of them,here are some suggestions for you. ②Eat healthily.You...
Look in the mirror at your own teeth or check out a friend's smile. The part of the tooth you can see is called the crown. It is covered with the enamel(珐琅质) which works as a barrier, protecting the inside parts of the tooth. Inside the enamel is the dentin(牙本质) which ...
和医生交谈 Parts of the body 身体的部位 简介 arm 手臂 leg 腿head 头 hand 手feet 脚 neck 头颈back 背 hair 头发elbow 肘部 stomach 腹部knee 膝盖 finger 手指nose 鼻子 ear 耳朵toe 脚趾 mouth 嘴巴eyes 眼睛 tongue 舌头teeth 牙齿 shoulder 肩膀lips 嘴唇 chest 胸thumb...