火药

Explosive grenades are one of the oldest types of gunpowder w EA pon, and one of the most dangerous to use.

掷弹是最古老的火药武器之一，也是使用风险最大的火药武器之一。

This paper compares the basic properties of traditional firework powders with expired propellants ,enunciates the technical requirements on powders imposed by traditional as well as modern fireworks.

文章分析比较了传统烟花药剂和退役火药的燃烧基本性能，阐述了传统烟花和现代烟花对药剂的技术要求，指出了利用退役火药制备安全环保型烟花药剂所应解决的关键技

The experiment and study of the bridge earthquake resistance beam crevice buffer materials ;2. In condition of the simulation test about the evaluation on impact loading on the explosive charge, several buffer materials of the power propellant charge of warhead are tested.

在&炸药装药抗高冲击过载评估技术研究&模拟试验软硬件条件下，对某战斗部火药推进剂装药几种缓冲材料性能进行试验测试研究，并对试验结果进行了分析和讨论，从而为某战斗部装填火药推进剂装药缓冲材料提供可靠依据。

Wet weather spoils the powder, windy weather blows out the match, or sends its sparks flying among the powder of horns or bandoliers.

潮湿的天气可以让火药失效，大风可以吹灭火绳，或者把火绳上的火花吹到装满火药的药筒或者弹带上。

Long guns, ranging in calibre from three-pounders to 48-pounders, had the advantage of a longer range but used more gunpowder; carronades, designed for ranges closer than 400 metres, had similar -- and even higher -- calibres but used less gunpowder.

长炮按口径可以从3磅到48磅不等，射程远，但需要很多火药；卡隆炮，用于射击400米以内的目标，拥有类似的---甚至更大的口径，但需要的火药较少。

They seldom, or even never, came systematically to the firearm literature of the Ming Dynasty, such as the prescription technology of the firing charge and multi-composition gunpowder.

但对某个时期的火器文献进行深入讨论则较少，而对明代火器文献进行系统的研究，诸如发射火药与多成分火药配方工艺几无涉及甚至是完全空白。

The results are found:①grain fracture is a primary factor to affect abnormal pressure;②to the propellant of weak strength at low temperature, if the reasonable charge and ignition and flame spreading condition is supplied, the coming and developing of abnormal pressure in guns can be prevented effectively.

实验发现：①火药破碎是影响压力异常的一个重要原因；②对于低温强度较差的火药，如果采用较合理的装药及点传火系统，能较为有效地防止膛内异常压力的发生和发展。

The result shows that the movement of the propellant grains is complex and relative to the ignition system very much. Guns with center tube ignition and flame-spreading system can alleviate the accumulation of the propellant effectively, and will have better performance.

结果分析表明：火炮点火后膛内火药颗粒的运动情况十分复杂，其运动规律与点传火的方式密切相关，点火孔均匀分布的中心传火管点火方式可以有效的改善发射过程中火药颗粒在弹丸底部堆积的现象，获得更佳的发射效果。

The only tools the settlers took were the two woodmen's axes, which theycould use to cut a path through the thick forests, as also the instruments,the telescope and pocket-compass.

至于火药，桶里大约共有五十斤，他们必须稍微带一些，但是工程师打算自己制造一种炸药，这样他们就可以把火药节省下来。

Based on the simulation of 3D unsteady muzzle brake flow field, computed the force given to the barrel while the powder flow through the muzzle brake, calculated the max backlash velocity, and lastly got the efficiency of muzzle brake.

该方法以带炮口制退器三维非定常流场的数值模拟为基础，通过计算火药气体流经制退器时火炮身管的受力，计算出身管在火药气体作用下的最大自由后坐速度，进而根据制退器效率的定义得到炮口制退器的效率。

Objective To investigate the effects of interleukin-1 β converting enzyme gene on the biologic characteristics of ovarian cancer cells.

目的 探讨白细胞介素-1 β转换酶的表达，对卵巢癌细胞生物学特性的影响。

Campylobacter: This illness is the most commonly identified cause of diarrheal illness in the world.

弯曲：这种病是最常见的原因查明腹泻病，在世界上。