专业术语—口腔生理学术语D1(英文详解)
Darwinian medicine - an approach to the treatment of infective diseases which takes account of the co-evolution between the host and its parasite 1.
Deciduous 2 - from the Latin "falling" it applies both to trees which lose their leaves in winter and teeth which are lost to make way for the permanent set.
Demineralisation - reduction in amount of mineral in tissue. This reduction occurs when the crystals of apatite are dissolved, usually in an acid environment.
Dental abscess- an abscess around the apex 3 of a tooth due to spread of infection from the pulp 4 .
Dental papilla - the condensation 5 of dental mesenchyme which provides the stem cells from which ondontoblasts, cementoblasts and osteoblasts will form the pulp-dentine, cementum and alveolar bone of the tooth socket 6.
Dentary - one of several bone which together made up the lower jaw 7 in early reptiles 8. During evolution the other bones, the articular and quadrate bones, became part of the inner ear, and the dentary became the single the mandible of mammals.
Dentine - a hard material like bone which forms the root and inner core of the crown of teeth. Unlike bone, dentine has fine tubules which contain the elongated 9 process of odontoblasts, the dentine forming cells.
Dentine-pulp - a term used to describe the unity 10 between dentine and pulp, and to view it as one integrated tissue.
Depolarisation - all cells have a slight difference in electrical potential between the inside and outside of the cell membrane 11. This difference is called a membrane potential and is due to a greater number of sodium 12 ions (positively charged) outside the cell than inside. This imbalance is maintained by a membrane pump which pushes sodium ions out of the cell. Another pump also pushes potassium ions into the cell so there should be no difference in the balance of positive ions. But the potassium ions leak back out again, so there is always a potential difference across the membrane. Nerve cells have the ability to depolarise or reverse the membrane potential so that the inside is positive and outside negative. This reversal is short lived and is soon corrected, but it is long enough to influence the adjacent parts of the membrane and to be carried, like a wave, all the way along a nerve axon to the next nerve where it reaches a synapse 13 The reversal is caused by a sudden opening of cell membrane gates which allow a flood of sodium ions into the cell. This flood causes the inside to become positive, but the gates are soon shut and potassium gates opened, which allows potassium ions to flood out and restore the membrane potential. This can all happen several times in one second, but after a while there is no flood, and the sodium pump has to get to work to build up enough pressure for the depolarisation to work again.
- The lazy man was a parasite on his family.那懒汉是家里的寄生虫。
- I don't want to be a parasite.I must earn my own way in life.我不想做寄生虫，我要自己养活自己。
- Overgrown deciduous shrubs can be cut back at this time of year.过于繁茂的落叶灌木可以在每年的这个时候修剪。
- Deciduous trees shed their leaves in autumn.落叶树木在秋天落叶。
- He reached the apex of power in the early 1930s.他在三十年代初达到了权力的顶峰。
- His election to the presidency was the apex of his career.当选总统是他一生事业的顶峰。
- The pulp of this watermelon is too spongy.这西瓜瓤儿太肉了。
- The company manufactures pulp and paper products.这个公司制造纸浆和纸产品。
- A cloud is a condensation of water vapour in the atmosphere.云是由大气中的水蒸气凝结成的。
- He used his sleeve to wipe the condensation off the glass.他用袖子擦掉玻璃上凝结的水珠。
- He put the electric plug into the socket.他把电插头插入插座。
- The battery charger plugs into any mains socket.这个电池充电器可以插入任何类型的电源插座。
- He delivered a right hook to his opponent's jaw.他给了对方下巴一记右钩拳。
- A strong square jaw is a sign of firm character.强健的方下巴是刚毅性格的标志。
- Snakes and crocodiles are both reptiles. 蛇和鳄鱼都是爬行动物。 来自《简明英汉词典》
- Birds, reptiles and insects come from eggs. 鸟类、爬虫及昆虫是卵生的。 来自《现代汉英综合大词典》
- Modigliani's women have strangely elongated faces. 莫迪里阿尼画中的妇女都长着奇长无比的脸。
- A piece of rubber can be elongated by streching. 一块橡皮可以拉长。 来自《用法词典》
- When we speak of unity,we do not mean unprincipled peace.所谓团结，并非一团和气。
- We must strengthen our unity in the face of powerful enemies.大敌当前，我们必须加强团结。
- A vibrating membrane in the ear helps to convey sounds to the brain.耳膜的振动帮助声音传送到大脑。
- A plastic membrane serves as selective diffusion barrier.一层塑料薄膜起着选择性渗透屏障的作用。
- Out over the town the sodium lights were lit.在外面，全城的钠光灯都亮了。
- Common salt is a compound of sodium and chlorine.食盐是钠和氯的复合物。