壳

A great number of viruses' capsid proteins are efficient assembly into icosahedral symmetry structures. The capsid structures obey the quasi-equivalence theory of Caspar-Klug, and they are directly composed of pentagons and hexagons.

摘 要 绝大多数病毒的衣壳蛋白装配成二十面体对称的结构，其衣壳结构遵从 Caspar-Klug 的准等价原理，即是由五边形和六边形直接拼接而成的几何构型。

The shells of the competition entry were originally of undefined geometry, but, early in the design process, the "shells" were perceived as a series of parabolas supported by precast concrete ribs.

在最初的歌剧院设计竞赛中，这些壳并没有几何学上的定义，但在设计过程的开始阶段，这些&壳&被定义为由一系列的混凝土肋骨支撑起来的抛物线。

This means that agricultural wastes such as cotton stalks, saw dust, nutshells, coconut husks, rice husks and forestry residues - bark, branches and trunk can be used for gasification.

这意味着，棉花秸秆等农业废弃物，锯屑，nutshells，椰子壳，稻壳和林业剩余物-树皮，树枝和树干可用于气化使用。

Dithiocarbamate-modified chitosan (chitosan xanthogenate, DTC-CTS) was characterized respectively by infrared, UV-Vis and Thermogravimetry. The different adsorbing capacities of DTC-CTS and CTS for Cu(superscript 2+) in aqueous solution were compared.

用红外、紫外和热重分析等测试技术分别对二硫代氨基甲酸改性壳聚糖（壳聚糖黄原酸钠，DTC-CTS）进行了表征和测试。

Hy rib pyramid lattice shell is researched systematically in this thesis. It synthesizes the merits of folded plate and spatial grid structure and will be widely applied in practical projects.

本文研究了一种新型的空间网格结构——折板形锥面网壳，它综合了折板和网壳的优点，有广泛的工程应用前景。

Two kinds of aeration modes, five kinds of amendment (rice hulls, wheat hulls, corn cores, wood chips and recycled compost) were tested.

进行了两种通风方式、5种调理剂（稻壳、麦壳、玉米芯、木片、回流堆肥）的堆肥工艺参数优化实验。

Two types of coupling vibration problems are considered in thispaper,i.e.those of spherical shells coupling with fluid and ehstic mediumIn particular,for elastic medium,we adopt the basic assumptionsemployed in the Pasternak model of elastic foundation and include theeffect of the foundation's thickness,however,to re-derive the relationshipbetween the pressure and deformation by the principal of minimumpotential energy.

文中考虑了两类耦合振动问题，即球壳与流体和球壳与弹性介质的耦合振动。特别对于弹性介质，采用工程上常用的Pasternak假设但考虑了简化模型中弹性层厚度的影响，利用能量方法重新推导了该模型的压力——变形关系。

This method can realize to reverse the wheel's moulds by its casting model., The casting moulds can be prepared by sintering precoated resin sand using SLS technology. Subsequently appropriate treatment to the moulds, the wheel-shaped aluminum, iron, and steel castings were poured successfully.

该工艺可由铸件三维数字实体模型&反求&精铸型壳实体模型，利用SLS技术直接烧结覆膜树脂砂，制造型壳，然后对铸型经过适当后处理，浇注了3种材质的金属件。

An auxiliary power motor with improved structure includes wheel shell, rotor ring, stator plate, central wheel axle and control circuit.

一种改良结构的辅助动力马达，包括轮壳、转子环、定子盘、中心轮轴及一控制电路，转子环的内环面埋设磁铁，定子盘周围固设环形矽钢片，其外环面具有多个T形齿牙，其齿数为非转子环磁铁数的公倍数，矽钢片设有三相星形线圈绕组，且于定子盘电机最佳启动角度处设有霍耳元件组；借此将定子盘固设于中心轮轴，令轮壳夹设住转子环并套设于中心轮轴两侧，当转子环旋转时，即可降低磁极间的钝齿转矩，令电动车行进更加顺畅无噪音。

Today approval requirements are so stringent that well over 50 separate rig and bench tests are required to evaluate the performance of candidate hydraulic oils during development.

在壳牌新一代得力士液压油的研发过程中，每个候选配方均需要完成50个以上的台架和对比试验，对其性能进行评估，以确保壳牌新一代得力士液压油获得所需的液压设备制造商的批准认可。

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。