月牙

• The experimental method of the model test with 1 : 6 scale based on the work mechanism of bearing of steel y - pipe strengthened inside with crescent rib in combination with surrounding rock mass simulated by composite materials is adopted and the regularity of their participant capacity to bear inner water pressure is analyzed in this paper
  摘要本文结合实际工程采用几何比尺为1 : 6的物理模型试验方法，用不同材料分层组合模拟围岩，对水电站内加强月牙肋钢岔管与围岩联合承载的工作机理、围岩分担内水压力的规律进行分析。
• Tourists like to climb up the hill bare - footed . at the hill - top they may have a birds eye view of the sand dunes which encircle a crystal - clear spring shaped like a crescent moon and then slide down from the hill , accompanied by a roaring sound of the moving sand . at the hill foot they may enjoy a slow riding on camelback
  全部到山顶后，俯瞰四周，可见沙山环抱中有一清泉，宽约45丈，长约1516丈，其水机形状恰似一变新月，这就是月牙泉，再从山顶溜下，身后响起一阵沙鸣之声，切实体会到鸣沙山何以得名，旅游者在鸣沙山下还可以骑骆驼沿山麓缓行，体验沙漠驼队的情趣。
• The toxicities of a batch of chlorinated aromatic commpounds to selenastrum ca pricornutum were determined , and relationships between their chemical structure and toxicity data were investigated based on molecular connectivity indices . fur thermore , leave - one - out tests were applied to examine the robustness of the pre diction model
  本文测定了一批氯代芳香族化合物对羊角月牙藻的急性毒性，运用分子连接性指数分析了化合物结构与其毒性之间的定量关系，并用逐一抽取法检验比较了模型的稳健性
• Molded grating is composed of fiberglass roving combined with a thermosetting resin series designed for different environments and applications smg series standard grating has a concave profile on the upper surface for skid resistance , grit tops are available upon request
  采用玻璃钢模塑成型工艺，在大型金属模具上制作，制品带有许多对称的方形或矩形网格的板材，称为玻璃钢模塑格栅， smg为标准英制模塑格栅系列，按客户要求上表面带月牙凹型或石英砂防滑，也可以做成表面封闭。
• The poor thing couldn t bear that : she grew white and red in rapid succession , and , while tears beaded her lashes , bent the strength of her small fingers to loosen the firm clutch of catherine ; and perceiving that as fast as she raised one finger off her arm another closed down , and she could not remove the whole together , she began to make use of her nails ; and their sharpness presently ornamented the detainer s with crescents of red
  这个可怜的东西受不了这个，她脸上一阵红一阵白，同时眼泪盈眶，拚命用她的纤细的手指想把凯瑟琳的紧握的拳头扳开。而且看出来她才扳开她胳臂上的一个手指，另一个手指又把它抓住了，她不能把所有的手指一块扳开，她开始利用她的手指甲了。手指甲的锐利马上就在那扣留她的人的手上装饰上红红的月牙印子。
• Then this dissertation discusses the flagellum - like oscillating propulsion , describes the types and characteristic of fish in details , analyses the configuration and force of fish and the undulatory propulsion mechanism , builds up the kinematic model of fish . and this dissertation systematically summarizes up the reference and suggestion to swimming micro robot ' s design and study by the aquatic animal for the first time . this dissertation discusses how to design the swimming micro robot which is based on flexible hinge and driven by pzt
  本文阐述了鞭毛类水生生物的推进机理，重点阐述了鱼类推进模式的分类及特点、鱼的形态描述及受力分析、鱼类波状推进机理，分析了鱼类游动过程中鱼体和尾鳍的运动，建立了月牙尾推进模式稳态游动的运动学模型，并且在国内首次系统总结了水生动物对泳动微机器人设计加工和理论研究的借鉴和启发作用。