他们被困在有一点空气的弹丸之地，再过40分钟洪水就会淹没这间屋子了。
Trapped in a pocket of air, they had only 40 minutes before the tide flooded the chamber.
如果把五个弹丸放在上面而不掉下来，捕蝉就像从地上捡球一样容易了。
When five pellets are placed on top without falling off, catching cicadas is as easy as picking a ball up from the ground.
枪弹测速系统可以测量弹丸速度大小。
Bullet velocity Measurement System can measure the projectile velocity bullets.
稳定储备量是保证弹丸稳定飞行的前提。
The stabilization storage of projectile is the precondition of its stabilization flight.
第二章对弹丸侵彻有界靶进行了理论分析。
The boundary effect of finite targets on the penetration are analyzed.
弹丸的气动外形对其外弹道性能有重要的影响。
The aerodynamic shape of projectiles strongly influences their performance on ballistic trajectory.
弹丸消融速率由消融物云和表面蒸发层共同控制；
The ablation rate is controlled by both the ablation cloud and the vaporizing surface layer.
本文研究了提高二级轻气炮弹丸速度的发射技术途径。
The launching technique to enhance the projectile velocities of a two-stage light gas gun was studied in this paper.
主界面显示两通道弹丸过靶波形、弹丸速度及连发弹射频。
The main panel displays two channel sampling signal, the repeated projectile velocity and the firing rate.
火炮弹丸内弹道特性和中间弹道特性对于引信设计而言十分重要。
The interior ballistic and the intermediate ballistic characteristics of artillery projectile are very important for fuze designing.
主要考虑了摩擦力、空气阻力等因素对弹丸的速度和轨迹的影响。
The effects of frication, air frication on the speed and trajectory of projectiles have been fully considered.
本文对厚编织复合材料板由硬的钢圆柱弹丸穿孔问题进行了研究。
The study is concerned with perforation of thick woven composite plates by hard steel cylinder.
论文主要研究从弹丸自由飞行数据中如何准确地拟合空气动力系数。
This paper mainly studies how to accurately fit the air dynamics parameter by the ballistic data of projectiles' free flight.
波兰则兼并了特申这块备受争议的弹丸之地，那里居住着几千波兰人。
Poland had annexed the tiny disputed region of Teschen, where thousands of Poles lived.
然后他们开始检查，发现那是某种类似弹丸的东西，但他们不知道那究竟是什么。
Then they started to look and discovered that it was some kind of projectile, but they didn't know what it was.
该方法是在期望弹丸命中目标的情况下求解机身期望指向及其变化率。
It is to solve the expected fuselage pointing and the rate on the assumption of that the target could be hit.
在单片机及计算机的控制下，该系统可以实现弹丸速度的自动测试功能。
Under the control of single chip processor and computer, this system can measure the bullet velocity automatically.
在某种意义上，如此广泛的，情绪化的事件从纽约这一弹丸之地产生是合理的。
And in a sense, it's fitting that such a sweeping, emotional issue has arisen from this tiny slice of New York City.
在多级同步感应线圈炮系统中，驱动线圈的轴向长度将会直接影响弹丸的速度。
In the system of the Multi-Stage Synchronous Induction Coilgun, the axial length of the drive coil directly affects the velocity of projectile.
希腊，这样一个弹丸之地，尽管遭受普遍质疑，仍为曾经举办这一现代盛典而骄傲。
The smallest country ever to host the modern event, Greece was proud to have pulled it off despite widespread skepticism.
结果表明，弹丸撞击速度一定时，弹坑深度和弹坑直径均与弹丸直径呈线性关系。
The results show that the depth and diameter of craters change linearly with the projectile diameter when the impact velocity is a constant.
在使用弹道积分方法求取弹丸飞行弹道坐标时，起始发射条件的准确性至关重要。
When using the ballistic trajectory integral method to obtain the ballistic coordinate, the precision of initiative shoot condition is vital.
研究利用无线电引信弹道监测原理进行长路径弹丸转速的测量方法和工程实现途径。
The method and its engineering realization of measuring long distance projectile rotating speed by means of radio fuse trajectory monitoring principle are developed.
本文在弹丸外形给定、外部热环境已知的基础上，进行弹丸头部内部的温度场研究。
In this thesis, the internal temperature field of the head of projectile is researched, based on the given projectile shape and external thermal environment.
建立了非对称弹丸在挠性渐速膛线身管内的弹丸一般运动动力学模型和运动微分方程组。
A general dynamic model and differential equations for an unsymmetrical projectile traveling in a flexible, increasing twist rifled bore gun tube are developed.
本文介绍了天平尾支杆以及模型船尾对超声这弹丸底压测量影响的实验研究和理论计算。
This paper presents the effect of tail sting and the Angle of boat tail on the base pressure at supersonic velocities.
河南、山东、河北的麦农在本月向云端发射化学弹丸以防止冰雹和暴雨破坏他们的庄稼收成。
Wheat producers in Henan, Shandong and Hebei fired chemical pellets into the clouds this month to prevent hail and heavy rain from damaging their harvest.
在同样的本底等离子体条件和弹丸初始参数下，注入氚丸比氢丸的穿透深度增加约40%。
Under the same plasma condition and initial pellet parameters, the penetration depth for tritium pellet increases by 40% in comparison with that of hydrogen pellet.
基于旋转稳定弹丸的6d刚体弹道方程，导出了弹丸转圈数公式，可对弹丸圈数进行准确计算。
Based on 6d rigid body trajectory equation, the spin-number formula of the projectile was deduced, by which the spin-number can be calculated.
基于旋转稳定弹丸的6d刚体弹道方程，导出了弹丸转圈数公式，可对弹丸圈数进行准确计算。
Based on 6d rigid body trajectory equation, the spin-number formula of the projectile was deduced, by which the spin-number can be calculated.
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