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资源稀少
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  “资源稀少”译为未确定词的双语例句
     The Pre-stress Concrete U-Shaped Beam was a newly type bridge structure, it had many merits compared with the traditional pre-stress concrete bridge structure like box-shape and T-shape beam, including low height, short length of the bridge approach, saving soil resource, lower project investment and shorten engineering structure period and so on, it also fitted to be applied to plain region and the places which limited the utilized soil resource and the bridge required net-height.
     预应力混凝土槽形梁结构是一种具有特殊结构形式的新型桥梁结构,与传统的预应力混凝土桥梁结构相比,如箱形梁、T形梁等,它具有高度低、引桥长度短、节省土地资源占用、工程投资少以及建设工程量少等优势,特别适合在平原地区,可利用土地资源稀少以及对桥梁净高要求有限制的条件下进行建造。
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     It is no doubt that China is a country characterized by its scanty land resources per capita and sharp conflicts between population and land.
     中国是一个人均土地资源稀少,人地关系矛盾尖锐的国家。
短句来源
     China is a country characterized by its scanty land resources per capita and sharp conflicts between population and land.
     中国是一个人均土地资源稀少,人地关系矛盾尖锐的国家。
短句来源
     Chimonanthus grammatus,a rare and endangered plant ,is endemic in Jiangxi with a very restricted natural distribution area. It has high value concerned its economic and scientific research,but this natural resource is very poor.
     突托蜡梅为江西特有的珍稀濒危树种,具有很高的经济和科研价值,但现有种群分布十分狭窄,资源稀少
短句来源
     The limitations of Randstad in itsbeing the economic center,its fast-speed urbaniza-tion,lack of land resources,growth in population anddefects in policies and management,etc. have broughtabout new problems and pressure as prominentcontradiction in land use,destruction of landscapeand deterioration in ecological environment to the"green core" .
     兰斯塔德的经济中心地位、快速城市化、土地资源稀少、人口增长及政策与管理方面的缺陷使“绿心”面临用地矛盾突出、景观被破坏、生态环境恶化等新的问题和压力。
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  相似匹配句对
     RESOURCE
     资源
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     The Scarcity Ownership and the Utilization of Resource
     资源稀少性、所有权与有效利用
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     TECHICAL RESOURCES
     技术资源
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     THE PRESERVATION AND UTILIZATION OF PRECIOUS,RARE AND SPECIAL CROP RESOURCES
     农作物珍贵、稀少、特殊资源的保存与利用
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  resource scarcity
Their weakest association with habitat and foraging preference was during winter, which may be related to resource scarcity.
      
In the background of the resource scarcity, it is significant to study the economies of scope in higher education to realize intensive development of higher education.
      
One is that endogeneity of growth is not only due to technology and knowledge formation but also to the effects of trade, resource scarcity and environmental degradation.
      
The convergence is attributed to the recent renewal of a single resource, Opuntia flowers, against a background of general resource scarcity.
      
(2) Alternatively, resource scarcity (particularly water) will result in strong plant competition.
      
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Xylaria nigripes (Kl.) Sacc. is a well-known nourishing medicinal, fungus. It grows in the abandoned termite nest and is rare in the nature. This paper explores the nutrient conditions which effect the yields of the mycelia of Xylaria nigripes, measures the dynamic variation in the formation of the mycelia and polysaccharide of Xylaria nigripes, and examines the correlation between the characteristics of esterase isozyme and the polysaccharide contents of Xylaria nigripes. It is found that glucose, starch and...

Xylaria nigripes (Kl.) Sacc. is a well-known nourishing medicinal, fungus. It grows in the abandoned termite nest and is rare in the nature. This paper explores the nutrient conditions which effect the yields of the mycelia of Xylaria nigripes, measures the dynamic variation in the formation of the mycelia and polysaccharide of Xylaria nigripes, and examines the correlation between the characteristics of esterase isozyme and the polysaccharide contents of Xylaria nigripes. It is found that glucose, starch and fructose are the most suitable carbon sources, for the mycelia to grow. Peptone, peanut meal and soybean meal are found to be preferable nitrogen sources, with peanut meal or soybean meal better than peptone, and Mg++ and Zn++ the essential elements. Among several organic acids, only citric acid is found to promote the growth of the mycelia of Xylaria nigripes. Formic acid (pH = 4.0) constrains the growth of the mycelia of Xylaria nigripes, which is consistent with the fact that Xylaria nigripes do not .grow in the termite nest where formic acid is present. Based on the experiments mentioned above, we selected the suitable medium for producing the mycelia and polysaccharide with the biostatistic method. In the suitable medium, a dense suspension of Xylaria nigripes with numerous white homogeneous mycelia pellets and abundant polysaccharide is successfully produced. Under optimal conditions, the yields of polysaccharide reach 15.35g/L. and that of mycelia reach 26.8g/L in culture liquid within 4 days, which meets the requirement of industrial production. The esterase "isozyme patterns are stable and maintain 2 bands under different cultural conditions and growing stages. The esterase activity, however, is found to be correlated with the growing days of mycelia and the polysaccharide contents of Xylaria nigripes.

黑柄炭角菌Xylaria nigripes(K1.)Sacc.是著名的滋补药用真菌,尤其是菌核部位生长在白蚁废弃的蚁巢中,生态条件特殊,资源稀少,研究和开发该菌具有重要意义。为了提高黑柄炭角菌菌丝体和多糖的产量,以便于组织工业化生产,本文探索了该菌的营养条件,测定其生长过程中菌丝体和多糖形成的动态变化,并研究了酯酶同工酶谱和多糖含量变化的相关性。结果表明:在深层培养时,碳源以葡萄糖、淀粉最佳;花生、黄豆、蛋白胨是适宜菌丝生长的良好氮源;Mg~(2+),Zn~(2+)等是其生长的必需元素;有机酸中仅柠檬酸对其菌丝生长有促进作用,在蚁酸影响下,pH值为4.0时,菌丝生长受抑制。在上述实验基础上,进行了产多糖和菌丝体的适宜培养基筛选试验,在适宜条件下,能培养出密集、白色、均匀的菌球和丰富的多糖,经4天培养的培养液中粗多糖量可达15.35g/L,菌丝干重为26.89g/L,符合了工业化生产要求。该菌的菌丝体酯酶同工酶谱较稳定,均为二条酶带,但它们的酶活性有所不同,与菌丝体生长的天数有关。并与多糖含量变化具有一定关系。

The performances of supported-Cu-Mn oxide catalysts for combustion oftoluene were studied. The results indicated that the addition of rare-earth oxide to CuO-MnO_2/Al_2O_3 significantly enhanced the activities and thermal stability of the catalyst and that there weredifferences between the performances of the catalysts with different supportors.

催化燃烧非贵金属催化剂的研制李庆水,黄育琪,金辉杰(化学系)作为汽车排气净化催化剂,Pt系贵金属具有催化活性高,耐热性好,寿命长等优点,但因其资源稀少,价格昂贵,而且还需相应采用无铅汽油等问题,大大限制了在我国的推广使用。近年来国内外学者都在致力于研...

Result of the present study showed that Anoectochilus roxburghii (Wall. )I,indl. is the genuine speciescurrently used as folk medicine, while A, formosanus Hayata. is a different species with the same name ofJinxianlian. trhe distribution and ecological environment of Jinxianlian were described and an index of eightspecies of Anoectochilus Bl. were listed to distinguish their maln eharacteristic differences.

金线莲文献考证结果确知花叶开唇兰Anoectochilusroxburghii(Wall.)Lindl.为民间使用的地道品种。资源调查结果显示:金线莲商品药材品种单一,但资源稀少。列出开唇兰属(Anoec-tochilus)8种植物的植物分布概况,分种检索表,澄清了该属3种种缘十分相近药用植物营养体的主要区别。

 
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