叶的

The main results were as follows: 1.After being radiated with 60 Co-γ, seven types of mutated plants were obtained through morphologic observation on the aftergrowth of the regeneration plantlets. The mutation characters included the purple leaf vein and petiole, the spotted leaf, the strumae leaf, the acerose leaf, the tender stem, the leaf shape variation, and the leaf color variation.

通过60 Co-γ射线诱变处理后的再生植株试管苗阶段的形态学观察，共获包括紫色叶柄、斑叶、瘤状叶片、细长叶片、茎杆细小、叶型变异、叶色变异的7种不同类型的变异植株。

The results indicated the following: 1 All of the root, stem, leaf and bud of Ambrosia trifida have higher biosorption capability for Cu~(2+).

本论文获得的主要结论为： 1三裂叶豚草的根、茎、叶、花蕾四个部位对Cu~(2+)具有较强的吸附作用，且吸附能力的顺序为叶＞花蕾＞茎＞根。

We choose the arid land of northwestern China as our study area because of its extensive area, specific geographical location, dry climate, varied topography, vulnerable ecosystems and long-term human disturbance, as well as the existence of current conflicts between economic development and environmental protection. Based on the literature, we choose ten desert species with clear and relatively accurate geographical distribution ranges to model their distributions:Anabasis brevifolia, Atraphaxis frutescens, Calligonum mon-golicum, Ephedra przewalskii, Gymnocarpos przewalskii, Haloxylon ammodendron, Haloxylon persicum, Ka-lidium cuspidatum, Salsola laricifolia, and Sympegma regelii.

：选择面积广阔、地理位置特殊、气候干旱、地形地貌多样、生态系统脆弱以及人类活动长期干扰，而且目前面临着西部大开发和环境保护双重矛盾的西北干旱区作为研究区域，通过收集西北干旱区多种优势种和常见种的地理分布资料，选取10种分布范围相对明确、资料相对齐备的荒漠植物种：短叶假木贼、木蓼(A- traphaxis frutescens)、沙拐枣、膜果麻黄、裸果木、梭梭柴、白梭梭、尖叶盐爪爪、松叶猪毛菜(Salsola lar- icifolia)和合头草，定量分析其地理分布与气候因子的关系，并据此估测其潜在中心分布区和潜在最大分布范围，与实际分布范围进行比较。

In this thesis, the breeding system and reproductive strategies of the three species were observed and analysed. The adaptation and evolution of the genus Ligularia under the condition of psychro-environment were discussed.The result showed that the flowering and fruiting periods of the three species were from mid-June to the beginning of October, and their inflorescences were racemose arrangement with capitulum.

本研究全面观察分析青藏高原东缘分布的箭叶橐吾、黄帚橐吾和掌叶橐吾的繁育系统；研究箭叶橐吾和黄帚橐吾各自居群中有性生殖和克隆繁殖的权衡关系，分析克隆繁殖与生态适应，探讨橐吾属植物对高寒环境胁迫条件下的适应与进化。

One of the classification models that based on statistic theory is Bayesian network classifier.

目前已知的分类算法中一种重要的基于统计方法的模型是贝叶斯分类模型，在贝叶斯分类模型中实用性最高和应用最广泛的是朴素贝叶斯分类器。

The epilepsy model induced by kainic acid is a dynamical model condition. 5-7 days after acute seizure episodes induced by a single systemic injection of a convulsant dose (10mg/kg) of KA the rats developed a long-lasting increase in seizure susceptibility and the characteristic histopathological features in the hippocampus similar to human TLE. So the KA model has been a well-known model to study TLE or intractable epilepsy.

颞叶癫癎红藻氨酸（kainic acid，KA）模型具有明确的动态变化过程，一次全身性给予惊厥剂量（10mg/kg）KA诱发SD大鼠急性癫癎发作后5-7天，动物开始出现癫癎发作敏感性长期增强，脑内亦发生与人类颞叶癫癎相似的神经病理、神经生化及神经分子生物学方面的改变，因此被认为是研究颞叶癫癎和难治性癫癎的理想模型之一。

Frond A term usually applied to large well-divided leaves as found in ferns, palms, and cycads.

大形叶，叶状体：该术语通常指蕨类植物、棕榈以及苏铁类所具有的大型的、分裂明显的叶。

It had been shown that effects of the different light intensity on the seedling height, stem diameter, leaf length and width, numbers of leaf,leaf area, total numbers of root and number of long roots were significantly different.

结果表明，不同光照强度下，香蕉苗的苗高、基径、叶长、叶宽、叶片数、叶面积、总根数和长根数都存在显著差异，但不同的性状对光照强度的反应不同。

Compared with progenies of inter-tree-pollinated E.urophyllaagain,progenies of self-pollinated E.urophylla showsignificant inbreeding depression in height,DBH and volume;theyshow no significant inbreeding depression in water content ofgreen wood,basic density and bark thickness;their content of1%NaOH extractives increases significantly,and their maturefiber length decreases significantly.

与尾叶桉株间杂交子代比较，尾叶桉自交子代的树高、胸径和材积具有显著至极显著的近交退化，生材含水率、木材基本密度和树皮厚度无近交退化现象，1％NaOH抽提物含量呈略显著性提高，成熟材纤维长度呈显著性减短；尾叶桉自由授粉子代的近交退化规律大致与自交子代相同，但其退化程度远不及自交子代。

Nonuniform Fourier Transform has a variety of applications such as in radar, medical imaging and radio astronomy. Over the last few years, several algorithms have been developed for computing the NUF based on interpolating an oversampled Fast Fourier Transform.

非均匀傅里叶变换在雷达、通信、医学成像、射电天文学等诸多领域都获得了广泛应用，其快速计算是近年来的研究热点，通常非均匀傅里叶变换是在快速傅里叶变换的基础上通过内插来计算的。

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。