It was found that fire, which appears to destroy, only transmutes: elements are recombined, but each atom that existed before combustion still exists when the process is completed.
人们发现了那似乎在毁灭着万物的火，只不过是使万物变形而已；原素可以重新结合起来，燃烧之前就已存在的每一个原子经过燃烧过程之后，仍然继续存在着。
Before mixing with the products of combustion, the air is preheated.
空气在与燃烧生成物混合之前要进行预热。
Increasing the pressure of the fuel mixture in the combustion chamber before ignition helps to increase the power of an engine. This is done by compressing the fuel mixture to a smaller volume.
在点火前增加燃烧室内可燃混合气的压力有助于提高发动机的功率，这是通过把可燃混合气压缩到一个极小的体积来实现的。
Therefore, the process feed, combustion air, and fuel gas should be preheated as much as possible before considering steam generation in the convection section.
因此，在考虑通过对流生产蒸汽之前，应尽量将过程原料、燃烧空气和燃料气进行预热处理。
This paper introduces the application of treatment technology before and after combustion. So it is efficient to reduce emission.
本文介绍了在燃烧前以及燃烧后的处理技术的应用，从而有效地减少了排放物。
Heat and mass transfer process will not only affect the combustion temperature and gas distribution before the tuyeres but also affect the slag formation and pig iron quality in cylinder furnace.
其传热传质过程不但影响风口前的燃烧温度和煤气分布，而且还影响炉缸内渣铁的形成和生铁质量。
While the samples prepared by solution combustion have little surface area decay, behaving greatly high thermal stability, although they have the least surface area before calcining.
而溶液燃烧法样品虽然在高温焙烧前比表面积最小，在高温焙烧后比表面积几乎没有发生衰减，表现了优异的热稳定性。
During the last few minutes, before the class was over, the students observed the combustion of MgO.
在课程结束前的几分钟，同学们还观察了氧化镁燃烧的实验现象。
The shape of rich soot combustion area at high temperature coincides with the share of spray area before ignition.
速燃期内高温富碳燃烧区的形状与着火前一时刻喷雾场的形状相吻合；
It is a process by which the carbon in fossil fuels is captured either before or after combustion and sent to long-term storage in geological formations such as disused oil and gas fields at sea.
过程就是在化石燃料燃烧之前或是之后，将其中的碳捕获后，长期地埋存在地质层中，如海中废弃的石油或天燃气田。
This way can be used not only in the field of spontaneous combustion risk assessment in coal seam, but also in simulation before designing.
提出一种用专家系统的不精确推理来得出评估结果的新方法，此方法可以应用于煤层的评估及矿井设计前的模拟。
The running conditions before and after reforming, and the cold aerodynamic field in combustion zone after reforming are tested and evaluated.
测试和评价了改造前后锅炉运行状况、改造后的燃烧区域冷态空气动力场。
Surface analysis methods were used to investigate the physical and chemical structure of the burning surface of RDX-CMDB propellant before and after combustion.
运用几种表面分析方法研究了硝胺改性双基推进剂燃烧前后的表面物化结构。
To further understand the effect of tobacco stems in tobacco blend, a detailed comparative study of chemical components of tobacco leaves and stems before and after combustion was carried out.
为了加深理解梗丝在卷烟叶组配方中的作用，对比研究了烤烟叶片和烟梗的化学组成以及它们在不同温度下的热裂解产物。
Start the engine in the right time for proper combustion chamber supply of clean air and fuel. if the fuel systems are speeding up, before starting to press the "clear" button.
启动柴油机需要在准确的时间向燃烧室供给适当数量的干净的空气和燃油。如果燃油系统装有超速停止器，在启动前应按下“复位”按钮。
Start the engine in the right time for proper combustion chamber supply of clean air and fuel. if the fuel systems are speeding up, before starting to press the "clear" button.
启动柴油机需要在准确的时间向燃烧室供给适当数量的干净的空气和燃油。如果燃油系统装有超速停止器，在启动前应按下“复位”按钮。
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