查询词典 brittle star

Based on the foregoing analysis, the critical condition of realizing ductile/brittle transform is confirmed, and then, the model of ductile grinding of engineering ceramic is built.

以陶瓷材料压痕断裂力学、线性断裂力学和微观断裂物理学为理论基础，系统的分析和讨论了磨削加工过程中微裂纹的产生机理及其影响因素，建立了裂纹分布模型，并根据位错产生微裂纹机制，对磨削过程微裂纹的形成采用位错塞积模型来描述，从能量平衡的角度，讨论位错裂纹的稳定性与磨削应力的关系，确定了材料脆性去除和塑性去除转换的临界条件，最终建立以此为基础的工程陶瓷材料延性域去除模型。

Under the actual production of the traditional technique,the low chrome white cast iron grinding ball is more brittle,which is the main reason to disabled in production and employ.

在传统工艺的实际生产条件下，低铬白口铸铁磨球易形成较大脆性，这是导致此类磨球生产和服役条件下失效的主要原因。

The fracture toughness testing technique for the central cracked circular disk specimen is given to investigate the fracture behavior of brittle material polymethyl methacrylate under pure mode Ⅰ, pure mode Ⅱ and mixed-mode loadings. The experimental results show that the load distribution angle is always greater than 8° for all different loading conditions.

给出一个中心裂纹圆盘断裂试验的较完整的试验技术，并用此试验技术在岛津材料试验机上对有机玻璃(polymethyl methacrylate， PMMA)这种典型的脆性材料成功地进行纯Ⅰ型、纯Ⅱ型和复合型加载条件下的断裂试验。

There are four kinds of fracture ways of 7075/SiC composite under high-temperature compression, which are the evulsions of SiC from the matrix due to forming cavity near the interface and intensive phase , ductile fracture of the matrix due to the nucleation of cavity near the interface , the fracture near SiC particulate coacervate and brittle fracture of the SiC particulate.

喷射沉积7075/SiC复合材料高温压缩时的断裂方式主要有四种，即空洞在增强相与基体界面处形成而出现增强相从基体中拔出的现象、空洞在基体中形核长大而引起基体的延性断裂、颗粒团聚处的断裂和颗粒的脆性断裂。

We do have a flight spare that we could practice with, but we know from our experience with the cometary aerogel that it has changed somewhat in space; it has become more brittle .

我们确实有大量可供练习的备用品，但是我们从彗星尘埃的凝胶那里得到的经验是：凝胶在太空里发生了一些变化，变得更加易碎了。

However, it is not accurate to calculate the problem of continuum media. The FEM may forecast the failure area of the material reasonably, whilst it is hard to calculate the failure process in brittle media.

有限元法适于预测脆性材料损伤和破坏的区域，但难以直接用于计算和模拟脆性材料及结构发生破坏的整个过程。

The discrete element method and the finite element method have their own advantages and weaknesses. Basically, the DEM was developed for predicting the failure problems accompanying with the transition from continuum to non-continuum media. However, it is not accurate to calculate the problem of continuum media. The FEM may forecast the failure area of the material reasonably, while it is hard to calculate the failure process in brittle media. Therefore it becomes a good choice to combine the two methods to construct a hybrid model.

离散元法和有限元法等数值计算方法各有其优势，同时也都存在不足之处：离散元法适于处理由连续介质向非连续介质转化的破坏问题，但对于连续体计算结果精度不高；有限元法适于预测材料破坏的区域，但难以直接用于计算脆性材料破坏过程，因此将两种方法结合可以形成一种较好的混合模型。

This crinoid is part of a family of marine creatures that includes seastars, sand dollars, sea cucumbers and brittle stars.

这种海百合是包括海星、海胆、海参和海蛇尾在内的海生动物家属的一分子。

Honing action produces a characteristic criss-cross pattern on a bore known as crosshatch."Edge-broken"phenomenon often occurs at the corners of parts during brittle materials machining processes.

用有限单元法分析了磨粒作用在珩磨轨迹交叉点处的陶瓷材料应力状态，从理论上证明了粗加工中，珩磨轨迹交叉点处陶瓷材料的崩除型去除方式。

For Spirits when they please Can either Sex assume, or both; so soft And uncompounded is thir Essence pure, [ 425 ] Not ti'd or manacl'd with joynt or limb, Nor founded on the brittle strength of bones, Like cumbrous flesh; but in what shape they choose Dilated or condens't, bright or obscure, Can execute thir aerie purposes, [ 430 ] And works of love or enmity fulfill.

V2：跟他同来的有古河幼发拉底和埃及、叙利亚界河之间的神祗，男的总名巴力，女的通称亚斯他录：原来天上的精灵为男为女可如意，也可以兼有两性，因为他们的素质柔软轻纯，不必裹紧四肢和关节，也不必笨重的肉体和脆骨撑持；他们可以随心所欲地变形，或伸或缩，或明或暗，随意飞行，随爱憎的不同，遂行各种工作。

We are in a good position to meet your requirements.

我们完全可以满足你方的需求。

We are all pervade d with a sense of disaster.

我们普遍有大祸降临的感觉。