查询词典 put down roots

To probe into either the attractiveness to or avoidance from phylloxera of grape rootstocks and cultivars with different tolerance, as well as into the volatile components from their roots, the method of invitro root segment culture was used to investigate the selectivity of Phylloxera viticola Fitch to the roots of grape rootstocks '5BB' and '140Ru' and cultivar 'Kyoho'.

为了探讨不同抗性水平砧木及品种对根瘤蚜吸引及驱避效应以及鉴定挥发性物质组分，采用离体根段培养法测定葡萄根瘤蚜Phylloxera viticola Fitch对砧木5BB，140 Ru及栽培品种巨峰的选择性，发现根瘤蚜对栽培品种巨峰的根段具有很强的选择性，至接种后3d，67.13%的根瘤蚜优先选择巨峰；而对5BB和140 Ru的选择性却很差，分别有15.29%和17.58%的根瘤蚜选择5BB及140 Ru。

Based on the water and fertilizer coupling experiment in corn field,one-dimensional soil moisture content model containing the water uptake corn roots is used in this paper to simulate the evapotranspiration and the water uptake of corn roots and the change of soil pondage and soil moisture budget under the different water and fertilizer coupling conditions in corn field.

结果表明：在玉米生长初期以棵间蒸发为主，其后则是以植株蒸腾为主；玉米在30～40 cm土层吸水速率达到最大值；玉米灌水量为田间持水量的70%与85%对土壤0～80 cm土层贮水量的贡献是相等的，并且高肥力在一定程度上可增强根系的吸水能力，高灌水可增强玉米根系对养分的吸收利用，但对于提高水肥利用率来说，理想的处理为中肥中水。

In this paper, we discuss when a quartic equation has no real roots, and obtain a necessary and sufficient condition on a quartic equation which has no real roots.

本文讨论了一元四次方程无实根的一些充分、要条件，并得到了一元四次方程无实根的一个充要条件。

F. pumila had the strongest capacity to adhere to walls, and it formed a quite good covering landscape by means of a large quantity of adventitious roots. Furthermore, it was tolerant to shade, and the effects of shading on its growth and landscape covering were very small. P. heterophylla had the rapidest growth and covering speed, and it adhered to walls by adhesive discs, but was defoliated in winter or after a long period of shading. The other three vines climbed walls using adventitious roots, and their adhering capacities were all relatively poor. However, E. fortunei still formed a relatively good covering due to its rapid growth and emerald leaf colour. After shading for four months, leaves of F, pumila, C. grandiflora, and P. serpens became thin, and accordingly their leaf weight per unit area significantly decreased. Shading also reduced chlorophyll contents of C. grandiflora and E. fortunei but enhanced those of F. pumila and P. serpens, It did not influence leaf thickness, leaf weight or chlorophyll content of P. heterophylla. Whether shaded or not, the relationship between Pn and PAR for each species could be expressed as y=alnx+b, and furthermore there was a significant (P.01) correlation between them. Pn and LCP values for all five lianas also significant (P.01) correlated. Shading reduced LCP values of P. heterophylla, C. grandiflora and E. fortunei but increased LSP of F. pumila.

结果表明，1薛荔对墙体附着力最强，它依靠大量的不定根吸固在墙体上，形成很好的覆盖效果，而且薜荔耐荫，遮光对其生长与覆盖的影响很小；爬墙虎的生长与覆盖速度最快，它主要依靠吸盘吸固墙壁，但在冬季或长时间遮光后出现明显落叶现象，影响其覆盖景观；其他3种都依靠不定根沿墙面攀援，附着力相对较差，但扶芳藤由于生长较快，叶色终年保持翠绿，也能形成相对较好的覆盖效果；2遮光4个月后，薛荔、凌霄和蔓九节的叶片变薄，相应地这3种植物单位面积的叶片重量都显著减轻；遮光还使凌霄和扶芳藤的叶绿素含量减少，使薛荔和蔓九节的增加，但对爬墙虎的叶片厚度、叶重和叶绿素含量都不产生明显影响；3无论遮光与否，5种植物的Pn与PAR之间的关系都可用y=alnx+b表示，并且都达极显著相关，Pn与光补偿点之间亦呈极显著相关；遮光还使爬墙虎、凌霄和扶芳藤的LCP下降，并使薛荔的光饱和点升高。

Moreover,thepattern of sinigrin biosynthesized in hairy roots of B.juncea var.foliosawas the same as that in seeds,and sinigrin content in hairy roots reached29% of that in seeds.

并且叶用芥菜毛根中含有与种子中成分相同的芥子苷，毛根芥子苷含量可达种子含量的29%。

The new county system sport of 1940s was a large-scale and grass-roots political power developments that pushed . the result of Guangdong skeleton regime construction was the establishment of town village - two grass-roots regimes, but because of lacking of persons in wartime and outlay , skeleton regime construction did not realize the expecting programming and design ;the popular will organ couldn"t have an impact on the town and village administrative body, the county government became the only conductor."the region autonomy had not appeared. The town and village regime is still a regime under the control of landlord or country gentlement social class.

20世纪40年代的新县制运动是国民党在"地方自治"的旗号下推行的一次大规模的基层政权建设运动，新县制下广东基层政权建设的结果是在县以下乡村社会设立了乡、保两级行政机构；但由于战时广东人才缺乏、经费紧张，规划设计的民意机关只在形式上的建立起来，乡、保民意机关对乡、保行政机构没有能够发挥应有的指挥、监督作用，县政府成为体制内乡、保各级政权唯一的领导者与监督者，"地方自治"未能实现，乡、保基层政权依然是乡村乡绅地主阶级的政权。

Potted spider plant will be excavated to the root of the soil, cut off the roots, rot, leaving the fibrous roots, into a container bottle, bottle water and flowers into nutrient solution, so that ...

将盆栽吊兰挖出，去根部泥土，剪去老根、烂根，留下须根，放入容器瓶内，瓶里装入清水和花卉营养液，让。。。

But leaf color descended quickly. The roots grew stagnantly, root length and number of roots stopped increasing, the activity of root and root/shoot ratio descended quickly, and obviously.

但秧苗叶色迅速下降，地下部生长停滞，根长、根数停止增加，根系活力迅速下降，根冠比明显降低。

Some palms, mangroves and other tropical trees form woody prop roots, often called stilt roots.

一些棕榈、红树和其他热带树木形成木质支柱根，通常称为升高根。

Stilt roots : these are adventitious support roots, common among mangroves .

高跷根源：这些都是不定的支持根，除常见的红树林。

According to our present broadcasting situation,the thesis proposes using new technology to update and reform the present HFC. It also suggests broadcasting using self-advantage and arranging EPON in order to win the supermarket.

论文从我国广电的现状出发，结合实际，积极倡导采用新技术更新、改造我国现有的HFC网络；倡导广电现阶段利用自身优势，部署EPON网络来赢取市场。

A new general kinetic equation was derived in which the effect of the removal of condensation water was taken into account completely, and was applied to the polyesterification kinetic study of AA/HPHP and AA/NPG. It was found that the reaction order of self-catalyzed polyesterification was not constant. For these polyesterifications, the reaction order was 2.5 at a low temperature, while 3.0 at a high temperature.

考虑缩合水的排除对反应体系的影响，用体积浓度单位推导出一个新的聚酯反应总包动力学方程，并应用到AA/HPHP和AA/NPG两个聚酯化反应的动力学研究中，研究发现，自催化聚酯反应的反应级数并不是固定值，对于AA/HPHP和AA/NPG两个聚酯化反应而言，低温时反应级数为2.5，高温时反应级数为3.0。