main difficulty 中文意思是什麼

main difficulty 解釋
高難度
  • main : adj 1 主要的，主，全，總。2 充分的，盡量的；全力的，有力的。n 1 體力，氣力；力〈僅用於 with might...
  • difficulty : n. 1. 困難；難事，難局，逆境；障礙。2. 異議；爭論，糾葛。3. 〈常 pl. 〉財政困難，（經濟）拮據。
  1. The main difficulty in china is rampant piracy

    在中國，主要的難題就是盜版猖獗。
  2. The main difficulty was failure of refractories at high temperature.

    其主要的困難是高溫下耐火材料的損壞。
  3. Analyzing overseas and domestic context and developmental status in quo of hae, this paper concluded that the main difficulty and problem hae facing at present were following points : 1. be in lower social status. 2. running a school with deficit caused by some policies. 3. serious shortage of educational outlay

    本文分析了高等農業教育的國內外背景和發展現狀，認為：社會地位不高、辦學政策性虧損大、教育經費投入嚴重不足、教育資源緊張、招生、就業處于「兩難」境地、辦學無特色、社會服務功能不強及舉辦主體單一、辦學自主權不大是當前高等農業教育面臨的主要困難和問題。
  4. The main difficulty to achieve high data rate is the intersymbol interference ( isi )

    而碼間干擾是高速通信面臨的主要困難。
  5. The main difficulty was the us constitution which banned the granting of a " title of nobility "

    最大的困難在於美國憲法禁止接受榮譽職銜。
  6. Lack of funds is the main difficulty that faces them

    他們面臨的最大困難是資金不足。
  7. The main difficulty in the direct application of the galerkin and ray-leigh-ritz methods is the choice of the global functions.

    在直接採用蓋勒金和雷利--里茨方法時，最主要的困難在於如何選取整體函數。
  8. The main difficulty along with approximating to object ' s surface with multi - nurbs patches is that one must deal with more control points, especially the control points around the jv - patch corner because of the intertwining of the geometric continuous constraints along the boundaries converging on the corner

    用nurbs曲面分片逼近物體表面帶來的問題就是要處理大量的控制頂點，特別是n面角附近的控制頂點更需要特別處理，因為曲面片之間的幾何連續約束在角點處互相纏結。
  9. Among them, routing algorithms are the main difficulty of design and research on self - organized networks

    其中，路由協議是自組網設計、研究的主要技術難點。
  10. Numerical simulation is a very important aspect for this research, in which the main task is to solve the system of radiation hydrodynamic equations, especially, we usually do this task using lagrangian coordinates, and in this case the numerical treatment of three - temperature energy equations is a main difficulty

    數值模擬是這項研究的非常重要的手段，其核心內容是求解輻射流體力學方程組，而其中三溫能量方程的數值處理又是在lagrange坐標下求解輻射流體力學方程組的主要難點之一。
  11. This article makes a profound study on the principle and realization of the authentication method of pki and analyses its security. with the development of the enterprise cas, the existing trust fields need to be integrated, so how to process the trust path has been the main difficulty of it, this article puts forward a new scheme to process the trust path

    本文詳細討論了基於x . 509證書格式的pki認證技術的原理和實現過程，分析了這種認證技術的安全性，針對當前企業級ca眾多，急需進行互操作的情況，提出了一種新的信任模型，對現有的pki系統進行互聯，並給出了一個優化的信任路徑構建方案。
  12. The main difficulty in development of microsatellite ( or simple sequence repeats, ssr ) is to screen the specific sequences flanking ssr, a method to screen microsatellite based on sampl was tested in the chinese shrimp. randomly selective bands ( s1k s13 > s14 > s22 > s24 ) were cloned and sequenced, 61bp, i57bp 147bp, 152bp, 298bp sequences were obtained respectively. no ssr were found inslk s s s22 apart from the sampl primers sequence, on the other hand, a ssr sequence of ( ga ) 39 were found in s24, which comprises aflp primers only

    微衛星的發展主要受限於微衛星兩端旁側特異引物的篩選，本研究在中國對蝦中初步嘗試了基於sampl技術的微衛星標記開發，隨機選取了5個s枷pl條帶（ 511 、 513 、 514 、 522 、 524 ）進行了克隆測序，大小分別為161bp 、 157bp 、 147bp 、 152bp 、 298bp ，但在511 、 513 、 514 、 522四個片段中未找到引物序列外的微衛星序列重復; 524兩端引物均為傳統的aflp引物，在此測序片段中有一（ ga ） 39重復序列。
  13. At the meantime, the rock mass may alternate between loading and unloading and it exists in certain kind of liquid, such as surface water, unconfined water, confined water etc for its intrinsic crannies. the practical rock mass concerned project must solve the key stability pr oblem after the understanding of the complicated mechanical characteristic and the deformation trends to guide the following project design and construction for the demand of security, economy, feasibility and validity. however, the intrinsic nonlinearness and complexity of the engineering rock mass become the main difficulty to predict the stability and deformation, the corresponding structure design must ensure enough safety with all the determinate or random force combination, so a model without the geometry distortion and constitutive equation warp is necessary to be built for the quantificational analysis of practical structure ' s stress, for the simulation of the real process and for the determinate evaluation system and optimization

    由於實際工程巖體其固有的非線性和復雜性，使得求解對應的諸如其穩定性、變形等問題面臨較大的困難，而有關的工程結構的設計必須保證該結構在外來因素的作用下具有足夠的安全度、經濟性和合理性，這必然要求對巖體及其工程結構的受力與變形有一套量化評判體系和優化技術，抓住實際工程問題的本質特徵並建立可行的符合幾何模擬、本構模擬、受力模擬、過程模擬四原則的求解模型，通過該模型的數值模擬成果來指導巖體工程的設計、施工及運營、管理；而巖體結構面的存在使得基於傳統連續介質力學理論的理論分析和數值模擬面臨巨大的挑戰，物理模擬的試驗周期和成本也大大增加，而巖土體工程問題則成為典型的數據有限、了解程度有限類問題，這類問題的解決需要綜合應用理論分析、經驗判斷、物理模擬和數值模擬等方法，數值模擬可以完成目前許多技術手段無法完成的實驗，如參數控制，復雜條件下的邊界條件的處理，同時數值模擬具有高可重復性，且數值模擬的成本和人力開銷等遠低於物理模擬，因此研究巖土體工程問題的流形元數值模擬方法是一項具有理論和實際工程應用價值的重要課題。
  14. The main difficulty in the direct application of the galerkin and ray - leigh - ritz methods is the choice of the global functions

    在直接採用蓋勒金和雷利- -里茨方法時，最主要的困難在於如何選取整體函數。
  15. Shortage of skilled workers is our main difficulty

    缺乏熟練的工人是我們的大難題。
  16. Thirdly, analyze that the main difficulty of flow signal measurement is the measurement of small signal

    第三，分析了電磁流量計設計的主要難點是小信號測量的問題。
  17. Since 1990, many research organizations and factories have been engaged in the research on radial piston pump in our country, but their efforts resulted badly. the main difficulty lies in solving the problem of the friction between rotor and oil axis, slipper and stator

    我國從80年代末90年代初很多科研機構與生產廠家開始研究開發這種產品，但都不能解決轉子與配流軸、滑靴與定子兩對摩擦副燒研的問題。
  18. He addressed himself to the main difficulty

    他著手解決主要的困難。
  19. The hydraulic properties of rock masses are likely to be highly heterogeneous even within a single lithological unit if the rock is fractured. the main difficulty in modeling fluid flow in fractured rock is to describe this heterogeneity

    由於巖體中通常包含有大量的各種尺度的裂隙，因此其力學和水力學性質即使是在單一巖性巖層中也是高度非均質的。
  20. The main difficulty for the global convergence of the structured bfgs method lies in that the matrices generated by the method may not be positive definite. as a consequent, the direction generated by the method may not be a descent direction of the objective function

    建立具有全局收斂性的結構化擬newton法的一個主要困難是在於該演算法產生的矩陣不一定是正定的，從而產生的搜索方向不一定是目標函數的下降方向。
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