tract

noun

1. （连通身体组织或器官的）道，束
   a system of connected organs or tissues along which materials or messages pass
   1. the digestive tract
      消化道
   2. a nerve tract
      神经束
2. 大片土地；地带
   an area of land, especially a large one
   1. vast tracts of forest
      大片大片的森林
3. （尤指宣扬宗教、伦理或政治的）短文，传单，小册子
   a short piece of writing, especially on a religious, moral or political subject, that is intended to influence people's ideas

1. N-COUNT (土地等的)大片
   A tract of land is a very large area of land.
   1. A vast tract of land is ready for development...
      一大片广阔的土地可待开发。
   2. They cleared large tracts of forest for farming, logging and ranching.
      他们清除了大片的森林以经营农耕、采伐与畜牧。
2. N-COUNT (宗教、道德或政治的)短文
   A tract is a short article expressing a strong opinion on a religious, moral, or political subject in order to try to influence people's attitudes.
   1. She produced a feminist tract, 'Comments on Birth-Control', in 1930.
      她 1930 年写了篇女性主义的短文《论节育》。
3. N-COUNT 道;束
   A tract is a system of organs and tubes in an animal's or person's body that has a particular function, especially the function of processing a substance in the body.
   1. Foods are broken down in the digestive tract...
      食物在消化道里分解。
   2. A cold is an infection of the upper respiratory tract.
      感冒是上呼吸道的感染。
   3. ...urinary tract infections.
      尿路感染

1. Water is ideal to flush the kidneys and the urinary tract.
   用水清洗肾脏和尿道最理想不过。
2. Instruments developed at the hospital allow doctors to thread microscopic telescopes into the digestive tract.
   医院开发研制的仪器使医生们得以将显微内镜伸入消化道。
3. A vast tract of land is ready for development
   一大片广阔的土地可待开发。
4. They cleared large tracts of forest for farming, logging and ranching.
   他们清除了大片的森林以经营农耕、采伐与畜牧。
5. She produced a feminist tract, 'Comments on Birth-Control', in 1930.
   她1930年写了篇女性主义的短文《论节育》。
6. Foods are broken down in the digestive tract
   食物在消化道里分解。
7. A cold is an infection of the upper respiratory tract.
   感冒是上呼吸道的感染。
8. In the past nothing could grow on this tract of land.
   过去这块地不立苗。
9. Fresh fruits and vegetables are easily digested in the GI tract and do not cause systemic effects.
   新鲜水果和蔬菜很容易在GI系统中消化并不会影响系统。
10. So it's necessary for you to be careful not to catch cold and other upper tract respiratory infections.
    因此，患者一定注意防寒，预防感冒和上呼吸道感染等。
11. Just a high fever and convulsions, which results from a virus upper respiratory tract inflection.
    只是病毒性上呼吸道感染引起的高烧和抽搐。
12. They may also irritate the upper respiratory tract, causing coughing, choking, and general debility.
    这些也能刺激上呼吸道，引起咳嗽、窒息和全身虚弱感。
13. That glass-and-plastic device is used to study how drugs and foods dissolve through the GI tract.
    那种玻璃和塑料装置被用来研究药物和食物在消化道内如何溶解。
14. Outcomes included respiratory tract and other illnesses, incidence rate ratios, and vaccine effectiveness.
    结果包括呼吸道和其它的疾病，发病率的比例和疫苗效价。
15. Aim To study on several methods for diagnostic value of chlamydia infection of urogenital tract.
    目的探讨几种检测泌尿生殖道沙眼衣原体感染方法的临床诊断价值。
16. Urinary tract infection can lead to a serious disease.
    尿道性感染可能会引起很严重的疾病。
17. Such as colds can trigger the upper respiratory tract infection.
    像感冒等上呼吸道感染就能够引发此病。
18. Objective To improve X-ray in diagnosis of newborn congenital digestive tract malformation.
    目的提高和普及新生儿先天性消化道畸形X线诊断水平。
19. These gut hormones are frequently peptides, and regulate the movements and secretions of the alimentary tract.
    胃肠激素的化学本质是肽类，对消化道运动和分泌起调节作用。
20. Monitoring cows frequently postpartum and early treatment of infection will prevent long-term damage to the reproductive tract.
    产后经常观察奶牛和感染的早期治疗将预防对奶牛的生殖道产生长期的损害。
21. If not treated: they can cause urinary tract infections.
    如果不治疗：可造成尿道感染。
22. A B vitamin essential for the normal function of the nervous system and the gastrointestinal tract.
    一种B类维生素，对于维持神经系统和胃肠道的正常功能起关键作用。
23. The main infection sites was respiratory tract, the pathogen was main gram-negative bacilli and fungi.
    主要感染部位为呼吸道，病原菌以革兰阴性杆菌和真菌为主。
24. The most common side effects in clinical studies were upper respiratory tract infection, sore throat, and diarrhea.
    临床研究中最常见的副作用是上呼吸道感染，喉咙痛和腹泻。
25. The atmosphere is often highly irritating to the eyes and to the respiratory tract.
    大气常会刺激眼睛和呼吸系统。
26. Abs tract: Algae removal has been a rather important issue in China's water plants.
    在我国的水厂中，藻类去除一直是一个比较重要的问题。
27. Conclusion Fiberoptic bronchoscopy is an important tool to diagnose and remove foreign bodies of the lower respiratory tract.
    结论纤支镜可作为对下呼吸道异物诊断和钳取的重要工具。

noun

1. a bundle of myelinated nerve fibers following a path through the brain

   Synonym:    nerve pathwaynerve tractpathway

2. a system of body parts that together serve some particular purpose

3. a brief treatise on a subject of interest

   Synonym:    pamphlet

4. an extended area of land

   Synonym:    piece of landpiece of groundparcel of landparcel