与月球上相同，那些巨大陨石坑的范围（例如，那些巨大到自形成后尚未被尘埃填满的陨石坑）标志着火星表面的年龄。
As on the Moon, the extent of large impact cratering (i.e. craters too big to have been filled in by erosion since they were formed) serves as an age indicator for the Martian surface.
即将爆炸或着火的粉末粒子和空气的比率范围。
Range of the ratio of powder particles to air which the mixture will explode or ignite.
对所采集煤尘样品进行实验分析，测定了不同粒径范围下煤尘层和煤尘云的最低着火温度。
Analyzed the coal dust samples we collected, mensurated the minimum ignition temperature of coal dust layer and coal dust cloud in different diameter range.
往复炉排煤种适应性广，燃烧着火条件好，调节范围大，具有很大发展前景。
There is provided with great prospect to reciprocating grate for many types of coal, good combustion and big regulating scope.
结果表明，在分析可燃气体泄漏的危险性时，不仅应分析环境空间可燃气体的爆炸浓度范围，而且也要注意存在局部着火的可能性。
The results indicate that when flammable gas risk is analyzed, both the flammable gas explosion scopes in the environment space and local fire possibility should be paid attention to.
随着火灾规模的增大，隧道内各点烟流温度及影响范围均增大。
The maximum temperature and influential length of hot smoke on tunnel users increase with fire load.
研究结果表明：均质充量压缩着火发动机的最佳工作范围与发动机转速混合气过量空气系数和负荷有密切的关系；
The results show that the best operating region of HCCI engine is related to the engine load, speed, and the mixture excess air ratio.
但HCCI燃烧存在运转范围窄、着火时间和放热率不好控制等缺点，具体实施上还有许多困难。
The control of auto-ignition time and heat release rate is the most difficult technical question in realizing HCCI combustion.
阻燃控制电缆的主要特点是电缆不易着火或着火时延燃仅局限在一定范围内，适用于对阻燃性能要求较高的场合。
Fire-resistance cables can operate normoally for some times when it is burning except that it can transmit electrical power under normal condition. It is used in the places necessary to resist fire.
阻燃控制电缆的主要特点是电缆不易着火或着火时延燃仅局限在一定范围内，适用于对阻燃性能要求较高的场合。
Fire-resistance cables can operate normoally for some times when it is burning except that it can transmit electrical power under normal condition. It is used in the places necessary to resist fire.
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