三叶的

The result showed that the clustering degrees of the populations of Hippuris vulgaris,Eleocharis valleculosa and Blysmus sinocompressu increased first and then decreased from the invasive stage, settle ment stage to culminative developmental stage. While the clustering degree of the population of Suaeda glauca increased from seedlings to propagation in which the population appeared aggregation.

研究表明：杉叶藻、槽杆荸荠、华扁穗莞三种群由侵入期、定居初期到种群发育盛期的过程中，其集群程度先增大后减小，总体呈扩散的趋势；碱蓬种群，从幼苗到繁殖期，集群程度增大，呈聚集的趋势。

In conclusion, Based on Leaf abaxial epidermis, Caryopsis morphology, Silica body, Molecular phylogeny, the present tresults differ from the tradtional study indicate that Perotis, Tragus and Zoysia are immerged into Chloridoideae the subfam. Eragrostis, the tresults of this thesis support the conclusion of Flora of China (Zhou T-Y et al, 2001) and the three genera is not independently treated as a tribe.

从叶表皮微形态、颖果和硅酸体形态以及分子系统学证据等方面来看，本文的研究结果与传统分类有所不同：结缕草属、锋芒草属、茅根属应放在虎尾草族，画眉草亚科，本文支持周太炎等(2001)《Flora of China》中的处理意见，取消结缕草族，将结缕草属、锋芒草属和茅根属做为虎尾草族的三个独立的属处理。

Leaves bluish green with prominent white veins, petiolate; blade 3–4-ternately dissected; ultimate segments linear, plane or falcate.

叶带蓝色的绿色的具突出的白色的脉，具叶柄；叶片3-4三出多裂；末回裂片线形，平面或镰刀形。

Different plant expression vectors had been respectively transferred into upland cotton cultivars Jinman12, Jinmian7, Xinluzao1 and Jihe321 via Agrobacterium tumfaciens transformation. These vectors carried cryIAc3 gene, which encodes Bacillus thuringiensis δ-endotoxin, under the control of chimeric OM promoter, CaMV 35S promoter, and cotton leaf curl virus RP promoter respectively; snowdrop lectin gene (Galanthus nivals agglutinin, gna) trans-regulated by rolC promoter controlled TGAla factor; and multivalent expression construct of both cryIAc3-cpti fusion gene and gna gene. A large number of transgenic plants and their progenies had been obtained.

为了提高外源基因的表达量，延缓害虫产生耐受性，本文通过将携带有分别在高效复合OM启动子，CaMV35S启动子及棉花曲叶病毒RP启动子控制下的苏云金杆菌杀虫毒蛋白基因cryIAc3；反式调节因子增强韧皮部表达的雪花莲外源凝集素(Galanthus nivals agglutinin，GNA)基因；以及同时含有cryIAc3、豇豆胰蛋白酶抑制剂基因和gna三价抗虫基因的植物表达载体，以根农杆菌介导法分别将这些表达载体导入了陆地棉新陆早1号、晋棉7号、晋棉12号和冀合321等我国西北棉花主要栽培品种，经体细胞胚再生获得了大批转基因再生植株。

The results showed that the content of glycyrrhizic acid in wild glycyrrhiza is higher than that in cultivated glycyrrhiza.

结果表明，野生甘草中甘草酸的含量要高于人工栽培，三年生甘草中甘草酸的含量最高，根中甘草酸的含量要高于茎和叶。

The author of the dissertation finds that Yeats'relationship with Gonne involved friendship, spiritual marriage, estrangement, reunion, etc., and his passion for her lasted for several decades.

诗人叶芝经历对Gonne 三十几年未得回报的感情，情绪在不同阶段起伏跌落，极大的影响了他抒情诗的表达风格和艺术形式。

The result ofpairwise Fst and Neutrality tests revealed significant genetic differentiation amongfour populations,and evolution of mtDNA COI gene incompliance with the Neutralitytheory.The genetic distance was the biggest between HEB and JXL,and was thesmallest between SDT and JXL among the 4 populations.

遗传多样性研究采用了线粒体DNA COI基因序列、RAPD和PCR-RFLP三种分子标记研究大猿叶甲4个地理种群的遗传结构和群体遗传多样性。1、对长约335bp的mtDNA COI片段进行序列分析，在4个群体64个个体中，共发现37个单倍型，总变异位点35个，多态位点29个，含量(63.68％)大于含量(36.32％)。4个地理种群的核苷酸多样性指数分别为，0.082、0.035、0.099、0.186。

Performance prediction of the pump when transporting water and salt solution is also studied.Results are compared and analyzed with experimental data.6.The salt-out flow field is measured on three dimensions by Particle Image Velocimemter via radial and axial two test models.After image processing, velocity distribution of crystal particles in the pump is obtained.Particle flow field is visualized to reveal the particle motion law intuitionally.

此外对泵送清水和盐溶液时的性能也进行了预测，并将结果与外特性试验数据对比。6、运用PIV在径向和轴向两种测量模式下对泵内不同外部条件下盐析两相流场进行了准三维测量，经图像后处理，获得了盐析晶体颗粒在叶轮内、无叶腔中及轴面上的速度矢量分布，实现了颗粒流场的可视化，更为直观地揭示了泵内盐析颗粒的运动规律。

Based on the characteristics of numerical reconstruction for lensless Fourier transform hologram, a set of digital image processing algorithm is presented to eliminate zero diffraction component and "twin image".

针对无透镜傅里叶变换全息图数值再现过程的特点，提出了一套不同于以往的削弱或消除全息图 0级衍射和孪生像的数字图像处理算法。该算法分为三步。

In this paper,the phase distortion has been discussed,by using different reconstruction beam to reconstruct digital holographic image of 3D ob- ject in lensless Fourier holography.

本文研究了离轴无透镜傅里叶变换数字全息中，用非原参考光再现三维物体而引入的相位畸变问题，通过详细的理论分析，得出相应的相位畸变表达式。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。