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When the temperature of the modified Mo-grids is kept at 650 ℃, the modified Mo-grids' electron emission can not be detected with microammeter after 1000h life-span.

将样品进行电子管模拟栅发射试验，栅极温度为 650℃，试验 1000h以上基本无栅发射电流，可以提高栅控管的可靠性和寿命。

In chapter 5, the concept of zero-span tension known in papermaking area is for the first time introduce to wood science area to explore in-tree variation of longitudinal tensile strength of tracheids and its main influencing factors. In chapter 6, composite micromechanics and classic laminated theory are used to make a comprehensive and detailed analysis of the main influencing factors of mechanical properties of tracheids cell wall. Some experimental results acquired in the foregoing chapters are explained successfully. Results were summarized as follows: Mechanical characteristics of wood at micron scale: 1 At micron scale, the longitudinal mechanicai behavior of wood microtome section differs greatly from that of wood with normal size.

论文的第2章首先研究了微米尺度下木材的力学特性，为后面运用木材微切片拉伸技术奠定一定的理论基础；在第3章，首次考虑到了微米尺度下木材力学性质的尺寸效应，并运用木材微切片正常间距拉伸技术研究了管胞纵向弹性模量的株内变异规律；在第4章，首次利用纳米压痕技术中最新发展起来的连续刚度测量法直接在管胞细胞壁上进行纳米级的压痕实验，测量次生壁S〓层的纵横向弹性模量和硬度，从而把细胞壁力学的研究提高到一个更高的水平；在第5章，首次把造纸领域的零距拉伸技术引入木材科学研究领域，研究了管胞纵向抗拉强度的株内变异规律及其主要影响因素；第6章则运用复合材料细观力学的基本理论和经典层板理论对影响细胞壁力学性能的主要因素进行了全面而系统的分析，并为前几章的一些实验结果提供理论上的解释。

End point or mid span connectivity.

最后端点或是中间结点的连结。

We'll be able to look at millimetre movements over the time span of a year.

我们将会可以察觉在一年的时间里指距上的毫米运动。

Based on the vehicle-bridge interaction model, a new decoupling ineration method for solving dynamic equation has been developed. This method is so powerful for saving computer time that the simulation calculation for whole train crossing long-span bridge can be completed with both mini-computer and micro-computer.

根据所建立的车桥相互作用模型，提出了一个新的车桥动力方程迭代去耦解法，可以比原有方法大大节省计算机时，从而使得在小型计算机或微型计算机上实现整列车通过大跨度桥梁的全过程的仿真计算成为可能。

Then, the concept of changeable shrinkage design is initialized. After analyzing the influence of gap ration on the deformation of major and minor axis, the K〓 span is obtained.

利用建立的有限元模型，探讨了扁挤压筒内腔位移分布情况和内孔变形规律，提出了变过盈量设计的概念，并对缝隙度K〓对内孔长短轴变形的影响作了分析，得出K〓的取值范围。

At once indomitable, somehow timeless, able to span the generations; wise, loving, and an utterly irresistible mischievousness of spirit.

她是不屈不挠的人，甚至是不会因时间而变化，能够让好几代人感受到她的精神。

Almost 600 images by Chinese photographers span 50 years of tumultuous history at the Museum für Moderne Kunst in Frankfurt through Aug.

法兰克福 Museum für Moderne Kunst：又一个关于中国的展览，"人道主义在中国：摄影的当代记录"报告了在中国社会巨大转变中的个人故事。600张中国摄影家这50年来的记录。

Because sea letter is in " letter core " the success that goes up with modular group production, foreign capital company undertakes with domestic company the model is combined actively in succession, whole industry whether capture implementation of this good luck to span development, and be not changed to be a main task by the brim.

由于海信在"信芯"和模组生产上的成功，外资企业纷纷主动与国内企业进行模组合作，整个行业能否抓住这个机遇实现跨越发展，而不被边缘化是一个重要课题。

As compared with those of the control,the survival rate,stadia,feeding amount and molter body weight of 2nd instar and more older larvae,pupation rate,pupal span,cocoon weight,pupal weigh...

综合分析认为：YJ 2 0 0 0菌株对家蚕不仅低毒，而且对其生长发育、结茧和生殖力等均无明显的不良影响。

For the head-teacher of the class said that I had seriously broken the school rules,which led me to a three-day suspend class.

为什么呢？因为我的班主任说我严重的违反了校规，于是让我停课三天。

Many of them believe that the conversion of thousands of working-class folk in England spared that nation from the mass carnage and the tyranny that came with the revolution in France.

他们之中有许多人相信，在英国数以千计的劳工阶级之悔改信主使英国免於遭受如法国大革命所造成的大屠杀和专制暴政。