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特有树种
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  endemic tree
     THE LITTER DECOMPOSITION RATES OF TWO ENDEMIC TREE SPECIES OF CHINA
     两种中国特有树种的枯叶分解速率
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  “特有树种”译为未确定词的双语例句
     Camptotheca acuminata is a tree unique to China.
     喜树(Camptotheca acuminata)为中国特有树种
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     Genetic diversity and genetic differentiation of Torreya jackii Chun,an endemic species in China,were analyzed using Inter Simple Sequence Repeat(ISSR) molecular technique.
     采用ISSR分子标记技术,对中国特有树种长叶榧的遗传多样性和遗传分化进行分析.
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     Camptotheca acuminata, a tree species native to China, has gained great attention for its secondary metabolites camptothecin (CPT) which has remarkable anticancer and antiretrovirus activities.
     喜树(Camptotheca acuminata)是中国特有树种,因其次生代谢产物喜树碱具有显著的抗癌和抗反转录病毒活性而备受关注。
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     Camptotheca acuminata Descne is a native tree of China. Camptothecin (CPT), a monoterpene indole alkaloid in C. acuminata, has high anticancer activities.
     喜树(Camptotheca acuminata)是我国特有树种,所含喜树碱(camptothecin, CPT)为具有抗癌活性的单萜吲哚生物碱。
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     Camptotheca acuminata Descne is a native tree of China. Camptothecin (CPT), a monoterpene indole alkaloid in C. acuminata, has high anticancer activities.
     喜树(Camptotheca acuminata)是我国特有树种,所含喜树碱(camptothecin,CPT)为具有抗癌活性的单萜吲哚生物碱。
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     Camptotheca acuminata is a tree unique to China.
     喜树(Camptotheca acuminata)为中国特有树种
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     Study on the Peculiar and Precious SpeciesResources of Mangolia in Henan
     河南木兰属特有珍稀树种资源的研究
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     (2) Searching for wood species.
     (2)树种的检索;
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     The Endemic Plants in NeiMonggol
     内蒙古的特有植物
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     is endemic plant in China.
     为中国特有种。
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  endemic tree
Castanea squinii Dode, an endemic tree widely distributed in China, plays an important role both in chestnut breeding and forest ecosystem function.
      
(Sterculiaceae), an endemic tree of the Mascarene archipelago (Indian Ocean).
      
Basal area was significantly correlated with Shannon Weiner Index values for total (r?=?0.64, P >amp;lt; 0.01), utilitarian (r?=?0.58, P >amp;lt; 0.01), and endemic tree diversity (r?=?0.85, P >amp;lt; 0.01).
      
These correlations suggest that endemic tree species, of high global conservation value, may be the species group most influenced by changes in forest structure.
      
Calocedrus formosana Florin (Cupressaceae) is an endemic tree to Taiwan.
      
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Tsuga longibracteata is a species distributing only in China. This paper deals with some properties of it's wood, such as specific gravity, width of growth rings, late-wood percentage, shrinkage and swelling of wood, compressive strength parallel and perpendicular to the grain, tensile strength perpendicular to the grain, bending strength and shear strength parallel to the grain, toughness and hardness. The 5 boles experimented on were collected from Fujian province, of which 1369 samples were made.

本文研究我国特有树种长苞铁杉木材的密度、年轮宽度、晚材百分率、干缩和湿胀、顺纹和横纹抗压强度、横纹抗张强度、径向和弦向抗弯强度、顺纹抗剪强度、韧性、硬度等性质。试验用试样1369个,共进行各项物理力学试验2833次。 文中给出各种性质的平均值和标准差。并给出晚材率和各种强度与密度回归分析的回归方程18个。对密度和各种强度性质的回归关系的检验表明,每一强度试件均同时进行密度测定的方法,优于用各试样木段的密度和强度的算术平均数进行回归分析的方法。

Torreya grandis Fort.which is endemic in China belong to Taxaceae of Gymnospermae.Edible seeds are famous“nut”.Three crystal compounds obtained from it's leaves were identified as β-sitosterol,6-hydroxydehydroabietinol and a new diterpe- noid torreyagrandate by UV,IR,MS,NMR,X-ray diffraction,etc.

榧树(Torreya grandis Fort.)为我国特有树种,属红豆杉科(Taxaceae)。种子是-著名的干果。关于香榧的化学成分,尚未见前人报道。我们从香榧叶中分得三个结晶化合物。经鉴定其中二个为已知成分,即6-羟基脱氢松香亭醇(6-hydroxydehydroabietinol)和β-谷甾醇(β-sitosterol)。另一个为新二萜成分,命名为香榧酯(torreyagrandate)。

Insects cause considerable loss of seed in Keteleeria evelyniana Mast. in the central region of Yunnan Province.The insects damaged cone ranged from 60 to 90 percent. The most important species is Blastopetrova keteleericola Liu et Wu, gen. et sp. nov. Other insects are:Shirahoshizo coniferae Chao (Coleoptera:Curculionidae) and Dioryctria sp. (Lepidoptera: Pyralidae).In this paper, besides the descriptions of morphological characteristic of both adult and immature stages on Blastopetrova keteleericoIa, its bionomies,...

Insects cause considerable loss of seed in Keteleeria evelyniana Mast. in the central region of Yunnan Province.The insects damaged cone ranged from 60 to 90 percent. The most important species is Blastopetrova keteleericola Liu et Wu, gen. et sp. nov. Other insects are:Shirahoshizo coniferae Chao (Coleoptera:Curculionidae) and Dioryctria sp. (Lepidoptera: Pyralidae).In this paper, besides the descriptions of morphological characteristic of both adult and immature stages on Blastopetrova keteleericoIa, its bionomies, natural enemies, and control measures are also given.Blastopetrova Liu et Wu, Gen. Nov.Fore wing without a costal fold in male. Vein M_2 and M_3 closely approximated or connate at base. Male genitalia: With clasper(harpe). Sacculus is nearly 1/2 as long as valva, basal opening small. Female genitalia: Apophyses anteriores is almost as long as apophyses posteriores. With a pair of signa, the form different.Type species Blastopetrova keteleericola, sp. nov.This new genus is closely allied to Petrova Heinr. and Blastesthia Obr., but may be distinguished by the venation and the genitalia. In the fore wing of Petrova, vein, M_2 and M_3 separate at base. Blastesthia is with only one signa on the bursa copulatrix. In addition, Gravitarmata Obr., Barbara Heinr. and Syropetrova Diak. are related to the new genus, but these genera are without claspers. The main differences among these genera are distinguished by a key in this paper.Blastopetrova keteleericola Liu et Wu, sp. nov.Body length: 7—11mm, 10—12mm. Wing expanse: 17—23mm, 22.5—26mm. Fore wing with a lot of irregular cloudy patterns, which consist of grey, reddish brown and black. Ocellus grey. Central cell is separated by stem R. and M. Hind wing broad, grey. Central cell is separated by stem M_(1+2) and M_3.Male genitalia:Tegumen broad. Uncus very small, hemispheric. Socii developed, finger like; long, pending. Valva with obvious neck. Cuculus oval, with densely long hair on the surface,a row short spines on the outer margin. Sacculus large. Basal opening very small. Aedeagus short; cornuti, a cluster.Female genitalia: papillae anales longer, kidney shaped. Ostium bursae round; sterigma larger, hemicycle. Ductus bursae long, with two slender sclerite at the section approaching ostium bursae. Signa two, the big one "I"-shaped, the small one rivet form.Holotype (), Allotype(♀):Yunnan Province, Anning County, 18—Ⅲ—1983, 1885m. Collected by Wu Chunsheng.Paratypes(30, 30♀♀):Yunnan Province, Anning County, Huaning County, Lufeng. County. ibid.Holotype, Allotype and a part of Paratypes are preserved in the Institute of Zoology, Academia Sinica; and another part of Paratypes are preserved in Southwestern Forestry College.

云南油杉(Keteleeria evelyniana Mast.)是我国西南地区主要用材林和风景林的一个特有树种。近几年来,其球果经常遭受到蛀心虫的严重危害。结实受害株率为95%以上,球果受害率在60%以上,严重的可达90%以上,影响了结实和自然更新。经过3年的研究,摸清了云南油杉的球果和种子害虫有卷蛾、球果角胫象(Shirahoshizo coniferae Chao)和油杉球果螟(Dioryctria sp. )其中主要害虫是卷蛾,经鉴定为一新属新种,命名为云南油杉种子小卷蛾(Blastopetrova keteleericola sp. n. )。云南油杉种子小卷蛾在昆明温泉地区一年多发生3代,极少数只发生2代,以蛹在受害球果内越冬。越冬蛹于3月中、下旬开始羽化,4月至10月底为幼虫为害期。9月中旬,幼虫开始陆续化蛹越冬。该虫主要发生在结实良好的开阔稀疏林中。幼虫期和蛹期有天敌。建立种子园和母树林、保护天敌、应用内吸性或具渗透性的杀虫剂以及雨季施放苏云金杆菌或白僵菌等方法来防治该虫。

 
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