弹

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买民谣的吉他(之前我以为是专门弹民歌的)，古典是弹古典乐的不好弹流行歌曲。

In this paper, using multi rigid dynamics, by considering the match motion of the shooter s body, the automatic motion, floating and the rifle, a launch dynamic model is established for caseless rifle .

采用多刚体系统动力学理论，考虑人体、自动机、浮动体与全枪的耦合运动及自动机循环各阶段的运动与碰撞，建立了高频浮动新结构无壳弹枪在卧姿有依托状态下的发射模型，通过数值模拟，得出三发点射状态下无壳弹枪的发射特性，并与常规自动步枪作了比较，分析了无壳弹枪性能的优越之

The effect of refined cotton,carbon fiber content and length on the safety of caseless ammunition and self-ignition temperature of simulating bore test was analyzed by testing the ignition point of 5 s delay of the propellants containing carbon fiber or refined cotton,impact sensitivity and temperature of simulating bore test.

为了研究含有纤维的无壳弹发射药安全性，通过测试含有碳纤维素或精制棉的无壳弹发射药5s延滞期爆发点、撞击感度和模拟枪膛试验的自燃温度，分析碳纤维含量、长度和精制棉对无壳弹发射药安全性能和模拟枪膛试验的自燃温度影响。

The studies started with the traditional taxonomy of Collembola, emphasized to reveiew several Chinese familiar groups in soil such as Hypogastruridae and Neanuridae based on their external morphological characters, reported new species and new record species to China, and made a checklist of all the reported Chinese species.

本研究从弹尾纲的形态分类入手，在掌握弹尾纲各个类群主要的外部形态分类特征基础上，着重整理、鉴定了国内弹尾纲的球角科、疣科等土壤内常见类群，补充报道了中国新种和新记录种，整理了国内已知跳虫的名录。

Three types of subgrade filling material are selected to analyze the change rule of subgrade resilience modulus under different compaction. Meanwhile PFWD（portable falling wei-ght deflectometer） is combined to integrate this parameter with compaction of construction control index,which brings about the conversion relation between three subgrade filling material and compaction. It can provide reference for pavement design and construction.

选定三种不同类型的路基填料，分析在不同压实度条件下路基回弹模量的变化规律，并结合PFWD检测方法，将设计参数回弹模量与施工控制指标压实度联系起来，得出三种路基填料的回弹模量与压实度的转换关系，可为路面设计与施工提供合理的依据。

In the second part, the theory of numerical simulation is introduced, including description of body configuration, elastic-plastic large deformation constitutive equation and finite element formula. It is followed by the derivation of equation from the basic theory of elastic-plastic deformation. The solution to temperature field, thermal stress, thermal strain, equivalent effective stress and equivalent strain is achieved then. In addition, we exposit the relation between machine load and thermal load in coupling analysis.

介绍了物体的构形及其描述，弹塑性大变形的本构方程、有限元列式；并进一步论述了弹塑性变形的基本理论，推导了弹塑性方程组；阐述了温度场的求解、热应力及热应变的理论概要，说明了等效应力与等效应变，并进一步阐明了在热力耦合分析中，机械负荷与温度负荷之间的关系；此外，还简介了Marc AutoForge程序结构的特点。

The result of SSR analysis supported that the species status of Changshou kumquat; the Ningbo kumquat, Rong' an kumquat and Lanshan kumquat are the same species of Fortunella; some of the Citrus SSR markers can be used in Fortunella.

用NTSYS-PC软件进行分析，结果表明，金柑属植物与宽皮柑橘的亲缘关系很近；SSR聚类结果支持长寿金柑种的地位；支持宁波金弹、融安金弹、蓝山金柑均为金弹的栽培种的结论。

To make further progress in understanding gasoline lubricating behaviors, EHD traction and optical film thickness measurements of gasolines and MTBE in point contacts were carried out and compared with those of diesel fuels and hexadecane. Research is directed to understand how thin the films will be formed by gasoline fuels, and how is the transition from elastohydrodynamic to boundary lubrication.

为了进一步研究汽油的润滑行为，测量了汽油及MTBE的弹流润滑牵引力和油膜厚度，考察作为粘度最低的液体燃料的汽油生成的弹流膜究竟有多薄，以及如何由弹流润滑向边界润滑转变。

A new kind dynamic photoelastic is constructed which includes high-speed photography system and digital image processing system.

本文改进了传统动光弹试验装置，引入高速摄影系统和数字光弹图像处理系统，组成了一种新型动光弹试验系统。

The spring back in the distortion process was predicted by finite element method, and the predicted results were analyzed to find out the reason lead to spring back, and so as to precompensate the spring back.

利用有限元仿真对其变形过程中的回弹进行预测，并对预测结果进行研究，找出回弹根源，从而对其回弹进行预先补偿。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。