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Comparison with the diffusion cascade shows that they both have 4 roots,while the 2nd root is main characteristic root and the 4th one Z_4=1 comes into play only when the...

最后，在无供取料情况下，对压强偏移和流量偏移两种求解方法进行比较，结果表明，两者能得到相同的静态特征根。

The chicon quality after forcing was low and the yield, size, weight and density of chicon was small. In this paper, the changes of main chemical composition of chicory root during vernalization and storage at different temperature, the storage quality of chicory root at different temperature and the factors of affecting forcing were studied.

本试验以北京市农林科学院蔬菜研究中心提供的菊苣为试材，分别研究了菊苣根中主要化学成分在春化期间和不同贮藏温度下的变化情况，不同低温条件下菊苣根的贮藏品质以及影响菊苣软化的一些因素等进行了探讨，以期为今后菊苣根的贮藏和软化技术研究提供一些参考。

The absorption of root system was the main sources of nitrogen in the plant.The effects of matrix ventilation on the abaorption,transportion and metabolism of nitrogen in the root system of cucmber were discussed deeply.The results showed that contents of ammonium,nitrate,free amino acids and soluble protein in cucumber roots were higher in G1 treatment.Contents of ammonium,nitrate and free amino acids in cucumber roots were the trend of the dropping after the first rising in F1 treatment,but contents of soluble protein was lower11.03%than that of the control.

根系吸收是植物体内氮素的主要来源，本研究深入探讨了基质通气状况对黄瓜根系氮素吸收、运输和氮代谢的影响，结果表明G1通气处理根系的铵盐、硝酸盐、游离氨基酸和可溶性蛋白含量均较高；非通气处理(F1处理)根系内铵盐、硝酸盐和游离氨基酸含量呈先升高后降低的趋势，而可溶性蛋白含量始终较低，比对照降低11.03%。G1处理根系硝酸还原酶、亚硝酸还原酶、谷草转氨酶、谷丙转氨酶、谷氨酰胺合成酶活性均较高；而F1处理的酶活性在处理末期显著降低，其中谷氨酰胺合成酶活性比对照降低33.33%。

For a long period of time, widely used in the production of components of an effective insecticide rotenone is mainly from the genus Derris root extract, collect rotenone from the root to dig down to two meters deep, the human cost of not only high-cost and easy caused by soil erosion, many of the genus Derris production has stopped growing, leading to the market with rotenone as the main active ingredient of the biological pesticide manufacturers shortage of raw material sources.

相当长一段时间，在生产上广泛使用的有效杀虫成分鱼藤酮主要是从鱼藤属植物中的根部提取，采集鱼藤酮的根要挖掘至地下达两米深，不仅人力成本耗费高，而且容易造成水土流失，不少鱼藤属植物的产区已经停止种植，导致市场上以鱼藤酮为主要活性成分的生物农药制造企业原料来源短缺。

In order to explode and use Lespedeza, the thesis is divided into three main parts: root system growth and development research of Lespedeze bicolor Turcz., effect of cutting frequency on root system and aboveground part biomass and effect of cutting and germinating on endogenous hormone of root system.

为了为进一步开发和利用胡枝子资源，本文做了以下研究：对二色胡枝子根系生长发育的研究、刈割频度对根系及地上生物量的影响的研究及刈割和萌蘖对根系内源激素的影响的研究。

Methods 112 teeth treated by complete root canal preparation were chosen to fill the root canal,and the main points of nursing during canal obturation were summarized.

方法对112颗进行根管充填的患牙进行护理配合，总结根管充填护理的要点。

Jn the demonstration section of the paper, aiming at the main vegetables products in Shanxi and each region in Shanxi, some research has been done, including determining and analyzing occupation rate of market of the main vegetables products (Spinach, celery, Chinese cabbage, cabbage, rape, cucumber, turnip, carrot, eggplant, tomato, green Chinese onion, head of garlic, string bean, cowpea , lotus root) in Shanxi and comparing with other main producing regions of the whole country determining and analyzing scale advantage, efficiency advantage and aggregated advantage of main vegetables products in Shanxi and its each region.

在文章的实证研究部分，本文以山西省及各地区的主要蔬菜产品为研究对象，测定和分析了山西省主要的蔬菜产品(菠菜、芹菜、大白菜、圆白菜、油菜、黄瓜、萝卜、胡萝卜、茄子、西红柿、大葱、葱头、四季豆、豇豆、莲藕)的国内市场占有率情况，并与全国其他的主产区进行了比较；测定和分析了这些蔬菜产品的规模优势、效率优势和综合优势，并与全国其他省区进行了比较；对山西省各地区这些主要蔬菜产品的规模优势、效率优势及综合优势进行了测定和分析。

By way of analysing the structural characteristics of root tip, this paper clarifies that the root hair zone is the main position in absor bing mineral nutritions, and the absorption way is divided into apoplast and symplast channel because of the existence of the casparian strip in the root tip.

本文通过分析根尖的结构特点，阐明了根毛区是矿质养分吸收的主要部位，其吸收途径因根尖凯氏带的存在而分为质外体途径和共贡体途径。

The main work of our research was to study the effects of the combination of enhanced UV-B radiation 0.35w·m~(-2 and Cadmium 1umol·L~(-1 on the growth, photosynthesis, elements absorption and relocation in mung bean seedlings at the initial stage of growth, and the involving mechanisms about the change of photosynthesis under the different treatments were studied also. It was shown that the heights root length, lateral root length, lateral root number, area of leaves, dry/fresh weight of the overground parts and underground part were all inhibited by the single factor and combinative factors.

本文以0.35w·m~(-2)剂量的UV-B模拟增强UV-B辐射和1μmol·L~(-1)Cd~(2+)模拟Cd~(2+)污染，研究了增强UV-B辐射和Cd~(2+)及其复合处理对绿豆幼苗生长、光合作用以及元素吸收和分配的影响，并对不同处理条件下绿豆幼苗光合作用的变化机制进行了比较深入的分析，获得结果如下：增强UV-B辐射和Cd~(2+)及其复合处理8天，绿豆幼苗植株高度、根长、侧根长、侧根数、叶面积、地上部分干/鲜重和根系干/鲜重均下降。

This article elaborated Dingxi in the pea root rot research and the disease- resistant breeding progress,introduced the Gansu middle area pea root rot s main pathogenic bacteria is the root-rot syndrome which the eggplant fusariumFusarium solani(Mars Sacc,the pea silk pouch mildew and so on eight kind of cause of disease fungi compound invade dye cause.

论述了定西在豌豆根腐病研究及抗病育种的进展，介绍了甘肃中部地区豌豆根腐病的主要致病菌是茄镰刀菌Fusarium solani(MarsSacc、豌豆丝囊霉等8种病原真菌复合侵染引起的根腐综合症；通过选育抗根腐病品种是解决问题最经济有效环保的措施，先后培育出了不同生态类型的豌豆品种定豌1号到定豌5号，基本解决了生产中因根腐病导致的减产、绝收现象，这些品种在甘肃中部、宁夏南部的旱地农业生产中发挥了重要作用。

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。