tractnoun
（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
the digestive tract
消化道
a nerve tract
神经束
大片土地；地带
an area of land, especially a large one
vast tracts of forest
大片大片的森林
（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
tract
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1
N-COUNT (土地等的)大片
A tract of land is a very large area of land.A vast tract of land is ready for development...
一大片广阔的土地可待开发。
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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.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》。
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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.Foods are broken down in the digestive tract...
食物在消化道里分解。
noun
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1
- a bundle of myelinated nerve fibers following a path through the brain
- Synonym: nerve pathway nerve tract pathway
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2
- a system of body parts that together serve some particular purpose
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3
- a brief treatise on a subject of interest;published in the form of a booklet
- Synonym: pamphlet
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4
- an extended area of land
- Synonym: piece of land piece of ground parcel of land parcel
数据来源：WordNet
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A tract of land that has been surveyed and marked off .
已分土地已经被测量或划分的一大片土地。
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His billionaire grandfather famously bought the tract for a song -- $ 280000 , to be exact -- in 1986 , and wrote about lessonsfrom his stellar real-estate investment in this year 's letter to Berkshire Hathaway ( BRKA ) shareholders .
1986年，他的亿万富翁爷爷以非常便宜的价格购买了这一大片土地——准确地说是280000美元，还在今年致伯克希尔o哈撒韦公司（BerkshireHathaway）股东的信中总结了这笔一流房地产投资的经验。
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A vast tract of land is ready for development
一大片广阔的土地可待开发。
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A cold is an infection of the upper respiratory tract .
感冒是上呼吸道的感染。
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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。
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Vast tracts of the country are wild and undeveloped
乡间大片大片的荒地尚未开发。
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Foods are broken down in the digestive tract
食物在消化道里分解。
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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。
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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。
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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》。
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In the past nothing could grow on this tract of land .
过去这块地不立苗。
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Large tracts of wasteland have become a granary .
荒滩变成米粮川。
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They opened up large tracts of wasteland .
他们开垦了大片荒地。
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Large tracts of sandy wastes were reclaimed .
大片大片的沙质荒地被开垦出来了。
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There are tracts of desert in Australia .
澳大利亚有大片沙漠。
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They compared the marsupial 's intestines10 to those of pigs , by inserting a balloon into the animals ' digestive tracts to see how it stretched to fit the balloon , and found regions of varied11 thickness and stiffness .
他们将袋熊的肠道和猪的肠道做了比较，将一个气球塞进两种动物的消化道，观察消化道为了容纳气球是如何伸缩的，结果发现不同区域的厚度和硬度都不同。
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Clinical Analysis of Lower Respiratory Tract Infection in Patients with Malignant Tumor
恶性肿瘤患者医院内下呼吸道感染临床分析
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Clinical Analysis of 123 Cases of Lower Digestive Tract Hemorrhage
小儿下消化道出血123例报告
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Clinical analysis of vein injection on children with acute respiratory tract infection
急性呼吸道感染患儿门诊静脉给药临床分析
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Influence of psychological nursing care and health education on urinary tract infection patients
心理护理与健康教育对尿路感染病人的影响
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Results : The cause of respiratory tract complication are serious .
结果：呼吸道并发症病因多样，导致后果较为严重。
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Experimental study of sacral nerve distribution and its influence on lower urinary tract function
骶神经对下尿路的支配及功能影响的实验研究
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The two tracts variation of brachial plexus : one case report
双束臂丛变异1例
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Objective To clarify hospital urinary tract infection secondary to diabetes .
目的了解糖尿病患者医院内尿路感染情况。
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The research of the fungus ' distribution and resistance on respiratory tract infection patients
真菌在呼吸道感染患者中的分布及耐药性研究
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Clinical Investigation and Analysis of Nosocomial Fungal Infections in Lower Respiratory Tract
医院内下呼吸道真菌感染临床特点分析
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Risk Factors of Lower Respiratory Tract Infection in Neurology Department
神经内科下呼吸道感染危险因素分析
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Research Progress on the Relative Factors of Catheter-Associated Urinary Tract Infection
留置尿管伴随性尿路感染相关因素研究进展
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Change of immunoglobulin level in pilots during upper respiratory tract infection
飞行人员上呼吸道感染时免疫球蛋白水平的变化
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Results White matter fiber tract in all volunteers and patients could be observed clearly .
结果全部志愿者和患者均可清楚地观察白质纤维束形态。