这是自2003年的哥伦比亚号灾难后的第二次发射。
This is all the second launch since the Columbia tragedy in 2003.
中间极，二次发射电极一种用于一定电子管作第二次发射电极。
An electrode used in certain electron tubes to provide secondary emission.
发现号的升空是明年前半年航天飞机机队退役前的倒数第二次发射。
The Discovery lift-off is planned to be the penultimate launch before the shuttle fleet retires early next year.
本文研究的就是一种用于炮射导弹的新型发射技术，即应用高低压发射原理的二次发射技术。
This dissertation focuses on the study of a new launching technology of missile by the gun, in which the high-low launching theory is applied to the two-stage propulsion technology.
该公司的火箭可以二次使用，其设计不但可以发射至太空中，还可以在一天中往返数次。
The company's reusable rockets are designed to lift off for space and return several times a day.
它的第二次登月计划将是在2016发射“月船二号”漫游者，将“太阳神-1”低空飞越太阳的任务定在2018年。
Its second lunar mission will land the Chandrayaan-2 rover in 2016, and the Aditya-1 fly-by of the sun is set for 2018.
在2005年的第二次任务中，两名宇航员送上了太空一周，第三次的载人任务发射按计划将在明年开始。
A second mission in 2005 put two astronauts into orbit for a week, and a third manned launch is planned for next year.
第二次炮弹发射得准了点，落到了栅栏里面，扬起了一片沙土，但是没造成更大的破坏。
At the second trial, the aim was better, and the ball descended inside the stockade, scattering a cloud of sand but doing no further damage.
随后二次测试也发射失败。
我们搭建了一套实验装置，用来观察场发射中到达阳极屏上的电子(主要是二次电子)的能量分布。
An experimental instrument is set up to observe the energy distribution of electrons (mainly secondary electrons) on the anode screen in the field emission.
最新一次发射，是为了测试关键技术与收集数据，是中国的第二次探月发射。
The latest launch, to test key technologies and gather data, is China's second lunar mission.
利用发射信号为已知这一先验信息，提出了二次相关估计时延的解决方法。
The twice correlation method, which uses the apriori information of the sending signals, is proposed as a solution.
推导出高能原电子斜入射时的金属的有效真二次电子发射系数的表达式，它与入射角的余弦近似成反比。
This paper derived the formulation for the real efficient emission coefficient of secondary electron under the condition that high energy primary electron incident on metal obliquely.
研究真空表面闪络过程有两类理论：二次电子发射崩溃(SEEA)和电子引发极化松弛(ETPR)。
There are two kinds of theory for the vacuum surface flashover: secondary electron emission avalanche (SEEA) and electron triggered polarization relaxation (ETPR).
绝缘介质层的二次电子发射，使放电电流增大。
The secondary electron emission from the dielectric layer makes the discharge current increase.
嗯…平安无事绕月后的一个二次再入？此外，再入飞行器远远高端于发射简单的取样返回任务。
Hmmm.... A double-dip reentry after an uneventful trip around the moon? Additionally, that reentry vehicle is far larger than would be launched by a sample-and-return mission.
本文报告了以多孔玻璃为基材的微通道板的制备及其二次电子发射特性的测量结果。
The paper reports the fabrication of the MCP based on the porous glass (ceramics) and the measurement of secondary electron emission characteristic of the MCP.
通过研究几种发射脉冲的一次反射和二次反射的接收波形以及它们的误码率特性，研究了信道多径失真对室内无线光通信的影响。
The paper researches the received waveform and the characteristic of BER in one refection and twice refection, studies the influence of multipath distortion on the transmitted pulse.
场致发射过程中，二次电子发射现象不可忽视。
In the process of field emission, the secondary electron emission is inevitable.
为了测量空间材料二次电子发射特性，航天科研机构已进行了相关的研究，研制出了几代测试装置。
To measure secondary electron emission characteristics of space materials, space research institutions have done some research and developed several generations of test system.
介绍了反应堆堆芯中子源的功能，发射中子的原理以及秦山二期工程一次和二次中子源组件的结构和特点。
This paper described the function of neutron source assembly, the principle of neutron emission, and also described the structure and characteristics for primary and secondary neutron source assembly.
本文介绍测量绝缘介质二次电子发射系数的双枪方法，并在动态系统中进行测量。
A two electron gun method and an arrangement whereby the secondary electron emission yield of dielectric materials can be measured are introduced.
第二次，美国航天局因天气被迫中止发射发现号航天飞机。
For the second time, NASA was forced scrub the launch of space shuttle Discovery because of weather.
系统中发射器采用编码器编码后发送超高频信号，接收器采用二次混频型超外差式接收移动目标信号。
The system uses the emitter to send ultra high frequency signals after coding with signal coder and the secondary superheterodyne mixing receiver to accept the moving target signals.
依据多管火箭发射随机动力学的理论分析，运用虚拟样机软件的二次开发功能，建立了多管火箭发射系统随机仿真模型。
According to the theory of the launching random dynamic of MLRS, the virtual prototype software was re-designed for the random simulation model of MLRS.
嗯…平安无事绕月后的一个二次再入？此外，再入飞行器远远高端于发射简单的取样返回任务。
Hmmm... a double-dip reentry after an uneventful trip around the moon? Additionally, that reentry vehicle is far larger than would be launched by a sample-and-return mission.
本文报道利用红外分光光度计和微机系统，采用二次测量技术，测量材料表面法向光谱发射率的基本原理和测试方法。
The experimental principle and the method to measure the normal spectral emittance of materials by infrared spectrophotometer and microcomputer system are presented.
本文报道利用红外分光光度计和微机系统，采用二次测量技术，测量材料表面法向光谱发射率的基本原理和测试方法。
The experimental principle and the method to measure the normal spectral emittance of materials by infrared spectrophotometer and microcomputer system are presented.
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