有四种

Four different pathways of androgenesis have been observed:Pathway of vege...

在雄核发育的研究中，观察到有营养细胞发育途径，生殖细胞发育途径，营养细胞和生殖细胞混合发育途径，以及均等分裂发育途径等四种类型，并对这四种途径进行了讨论。

The first model is the optimization problems with s linear objective function subject to a system of fuzzy relation equations and a system of fuzzy relation inequalities, which are solved by using path method and 0-1 integer programming with branch and bound method.

第一种为约束为模糊关系方程和模糊关系不等式的具有线性目标函数的优化问题，采用路径法及0-1整数规划中的分枝定界法对其求解；第二种为约束为模糊关系方程和模糊关系不等式的格线性规划问题，采用直接法、路径法及0-1整数规划法对其求解；第三种为模糊关系不等式为模糊的，即约束中有一个可接受的容差，采用容差法及正负理想法对其求解；第四种是一种新的可能性模糊线性规划问题，采用模糊数大小比较法、"切片-粘贴"法及正负理想法，并设计了随机模拟的遗传算法对其求解；第五种为期望值模型，利用期望值将其转化为清晰约束系数的线性规划问题的方法。

Results:Significant differences could be seen in the12factors of16PF between signalman's scores and the norm.

结果： 通信兵在16种人格因素的12种上与常模分数具有显著差异；不同次元人格类型的通信兵在工作绩效上有显著差异；四种二元人格类型以及心理健康、专业成就和成长能力与工作绩效有显著相关；心理健康分数、创造力分数和恃强性因素分数对工作绩效有显著的预测作用。

Of which there were 14 bird species and 16 families 160 heads, 6 heads of mammals and 16 families 36 species belonging to the protection of wild animals at the national level have Crossoptilon, golden eagle, black stork, leopard four; two countries the protection of wild animals There are goshawks, great kite, sparrow hawk, eagle Ukraine, grassland birds, white-tailed harrier, hunting hawk, red hawk feet, kestrel, mandarin duck, the original musk deer, deer, and other 20 kinds of Huangyangchuan.

其中鸟类有14目16科160，兽类有6目16科36种，属于国家一级保护野生动物有褐马鸡、金雕、黑鹳、金钱豹四种；国家二级保护野生动物有苍鹰、大鸢、雀鹰、乌雕、草原雕、白尾鹞、猎隼、红脚隼、红隼、鸳鸯、原麝、獐、黄羊等20种。

Investigation was carried on tweenty-four sample stands of four districts in Nanning City, including (1) college area: the Subtropical Conservative Rainforest, the omni-tree Woods, the Pinus massoniana Woods in Guangxi Ethnic College, the TaoLi Garden, the Centre Garden, the Nurture Garden, the sod Garden, the Eucalptus woods, the Osmanthus fragrans Woods and the Livistona chinensis green Belt in Guangxi University;(2) residence: the Swiss Villa"s two greening sample standsand the Wenhua Villa"s three greening sample stands;(3) commercial streets: theXingming Road ,whose prime street tree is Dracontomelon duperreanum , the Yuanhu Road, whose prime street tree is Saraca chinensis Merr.et Chum, the Xingzhu Road, whose prime street tree is Artocarpus nitidus Tree, subsp.

住宅区：文华园的3个样地和瑞士花园的2个样地。主要交通干道：大学路的3个样地和民族大道的2个样地。商业区：以人面子为主要街道树的新民路，以红桂木为主要行道树的新竹路，以中国无忧花为主要行道树的圆湖路。调查结果表明：在南宁市四个功能区的24个绿化样地，主要的绿化乔木有 45种，前 10种依次是：人面子、假摈梆、垂叶榕、桂花、扁桃、蒲葵、阴香、马尾松、芒果和中国无忧花，主要的绿化灌木有24种，前8种依次是九里香、尖叶木犀揽、黄叶假连翘、扶桑、花叶朱蕉、紫蒲、短穗鱼尾葵和大花美人蕉，这些植物基本上代表了本市绿化植物的主体。

In the society of ancient China,juan,the kind of personality trend,often interwove with crazy,leisurely,clean,the upright and so on in the same place.This article has analyzed four types:juan slender,juan crazy,juan hidden,incorruptible,which could reflect the personality characteristic of juan in the most;chosed Qu Yuan,Ruan Ji,Tao Yuanming,Jiangkui as typical examples and involved the poem,the article, the Ci,the Fu to...bestow on four kinds of literary styles.

在中国古代社会，狷类人格倾向往往与狂与逸与洁与耿介之类的概念交织在一起，本文分析了其中最能反映狷性人格特征的四种类型：&狷狭&、&狷狂&、&狷隐&、&狷介&，并选择了屈原、阮籍、陶渊明、姜夔四位狷性倾向比较集中与典型的古代文人，涉及了诗、文、词、赋四种文体类型，进行了略有系统的讨论。

A PRR from the cruciferous plant Arabidopsis thaliana, confers responsiveness to bacterial elongation factor Tu in the solanaceous plants Nicotiana benthamiana and tomato, making them more resistant to a range of phytopathogenic bacteria from different genera.

当Zipfel和同事在西红柿和相近的烟草植物中表达出这种基因时，这些植物对来自于四种不同家族的病菌有了更高的抵抗力，这四种病菌分别会导致细菌性萎蔫病、细菌性斑点、冠瘿病等。

In addition, we'll discuss these four ballades from theme, motive, ways of creation and harmony, compare four different editions, then try to realize the intention of Chopin's creation and melody. Finally, we hope that we can find out whether revolution and unity in Chopin's writing from these four ballades.

另外，藉由主题、动机、创作手法、和声等四个向度来探讨这四首叙事曲，并比较四种不同的乐谱版本，推论出萧邦当时创作上的意图与如何适合於乐曲的个人诠释之浅见，最后，期望可从这四首叙事曲发现萧邦在乐曲创作上有无创新性与统一性。

The result shows that with the increase of stress time, relative water content on leaf is in a downward trend while Sedum spurium \\\"Coccineum\\\"、Sedum reflexum have a slight increase in the mid; MDA content in these plants changes very slowly except that in Sedum spurium \\\"Coccineum\\\" which continues to increase; the relative electric conductivity in the first 20d in four kinds of plants is on the rise and the value of sedum lineare and Sedum spurium \\\"Coccineum\\\" decreases in the last 5d of stress; the changes of SOD activity in four sedums are similar, which increase first and then decrease and then rise again.

结果表明：随着胁迫时间的延长，植物叶片相对含水量呈下降趋势，红叶景天和反曲景天中期值稍有上升；丙二醛除红叶景天持续上升外，其它三种植物变化缓慢；相对电导率四种植物在前20d都呈现上升趋势，胁迫最后5d时佛甲草与红叶景天值下降；SOD酶活性四种植物变化趋势相似，呈现先上升后下降再上升趋势。

The experiment used Four kinds of farmland common herbicides (Fenoxaprop、Clethodim、Glyphosate、Fenoxaprop-p-ethl),MDA content、Leaf cell menbrane permeability、Chlorophyll content were tested under three treaments of different medicaments and combined with the growth index.The results showed:(1) When they were used in normal concentration,growth and the others physiological indexes had obviously different under four kinds of herbicides treatments.According to effects of four herbicides on Zanthoxylum bungeanum Maxim ,the effect of Glyphosate randed first,the rest ones were Clethodim、Fenoxaprop-p-ethl and Fenoxaprop.

以农田中常用的6.9%骠马水乳剂、24%收乐通乳油、88.8%飞达红水溶性粒剂、6.9%威霸水乳剂等四种除草剂为供试对象，通过对各药剂的三种浓度处理下花椒叶片中丙二醛含量、叶片中叶绿素含量、叶片中细胞膜通透性的测定，再结合生长量指标进行分析研究，结果表明：(1)在常用浓度下，四种除草剂对花椒生长量及各生理指标的影响有很大差异，飞达红影响最大，依次为收乐通、威霸、骠马。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐