生叶的

Any of various deciduous shrubs or trees of the genus Alnus, native chiefly to northern temperate regions and having alternate, simple, toothed leaves and tiny fruits in woody, conelike catkins.

桤木一种桤木属的落叶灌木或乔木，原主要生长于北温带地区，有互生的锯齿形单叶，在其木本的锥体柔荑花序中有微小的果实

When single herbicide was used in the field for two years, the dominant species took place corresponding alternation. The community structure that originally mostly consisted of dicotyledonous weeds , such as Alopecurus aequalis sobol., etc.

通过连续几年的单一除草剂使用，烟田杂草的优势种群发生了相应变化，原来以看麦娘、马唐、稗草等单子叶杂草为主的群落结构演变成了现在以稗草、马唐及胜红蓟、两栖蓼、茴茴蒜为主的单、双子叶杂草混生结构，说明烟田施用除草剂会引起杂草群落结构变化，因此，在生产上则应注意除草剂的轮换使用。

Titanus in Europe as the source data, the above three bioclimatic variables as parameters, BIOCLIM as algorithm, the distribution of S. titanus in North American was analyzed in order to test whether these parameters are appropriate or not. The results revealed that the Great Lakes region of USA and Canada and the Finger Lakes region of New York State were the best habitat for S.

结果表明：以月平均温、最冷月最低温和最热月最高温变量为参数，以欧洲的已知分布为源数据，用 BIOCLIM 算法可以准确预测出包括美国和加拿大的大湖区和纽约州的芬格湖群在内的大片区域是葡萄带叶蝉在北美洲的适生区。

Small aquatic plant having tufted awl-shaped leaves in a basal rosette and minute white flowers; circumboreal.

一种十字花科的小的水生植物，具有簇生的锥状叶和微小的白花；遍及北部地区。

A poisonous Eurasian evergreen shrub having fragrant white, rose, or purple flowers, whorled leaves, and long follicles containing numerous comose seeds.

欧洲夹竹桃一种有毒的欧亚长青灌木，有白色、玫瑰色或紫色的芳香花朵，轮生体叶和含有许多具毛丛种子的长的小囊

Axillary winter buds 3 with 2 lateral flower buds and 1 central leaf bud; terminal winter bud present; leaves conduplicate when young; endocarp often pitted, rarely smooth.

有2的Axillary的冬芽3 横向花芽和1个中心的叶芽；顶生的冬芽宿存；对折的叶幼时；内果皮经常使相斗，很少光滑。 48 Amygdalus 桃属

Deciduous, rarely evergreen; leaves papery or rarely leathery; style cylindrical or clavate; stigma capitate or disciform, rarely punctiform; locules of fruit stone 2; anthesis spring and early summer, rarely autumn; bracts inserted distal and adnate to i

落叶，很少常绿；叶纸质的或很少革质；花柱圆筒状的或棍棒状；柱头头状或盘状，很少点状；果核的室2；开花期跳起和初夏，很少秋天；苞片着生的上部和贴生于i 3 Cornus subg。 Kraniopsis 梾木亚属

The antifungal activities of these materials were investigated and build foundation to develop low poison plant antifungal products. In experiment, polyphenols were extracted by reflux ectraction method which applyed petroleum ether to degrease and methyl alcohol solvent. Phenolic hydroxyl were examined and inspected by colour-developing reaction and the content of total polyphenols was determined by UV-spectrophotometry. Screening test were performed to the antifungal activities of polyphenol extraction by the tube dilution method to the selected ten pathogenic fungus such as Dothiorella gregaria, Rhizoctonia solani, Phyllosticta pirina, and the minimal inhibitory concentration were measured. The column chromatography and thin layer chromatography were applyed to separate and analyse cortex extracts of Dracaena cochinchinensi Lour.

实验部分采用以石油醚脱脂，甲醇为溶剂的回流提取法来提取植物多酚，用显色反应检识酚羟基；采用紫外分光光度法对多酚粗体物进行总多酚含量的测定；选取了聚生小穴壳菌、立枯丝核菌、梨叶点霉等10株常见农林业致病真菌，采用试管液基稀释法对多酚粗提取物进行了抗真菌活性筛选试验，并测定其最低抑菌浓度；采用柱层析法和薄层层析法对其中抑菌效果较好的龙血竭进行分离分析，根据其中3种化合物的光谱数据UV、IR、~(13C-NMR、1H-NMR和MS鉴定其结构。

Whitish hairy plant with featherlike leaves and a few stout stems each bearing an especially handsome solitary large yellow flower head; mountainous regions north central United States.

一种白色、多毛的植物，具有羽状叶、几根粗壮的茎和极其美丽的大而单生的黄色头状花序；生长在美国中北部的山区。

Pedicelled spikelet absent or represented by a small bristle; pedicel free from and longer than adjacent internode, subulate to narrowly ovoid or leaflike.

无的或一小的刚毛描述的Pedicelled小穗；花梗离生和长于临近的节间，钻形的到狭卵球形或者叶状。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。