以蒸汽分子扩散模型为基础，建立了预测霜层生长过程的数学模型，并建立了以液氮为冷媒的管内强制流动结霜实验台。
Based on molecular diffusion model of water vapor a theoretical model of frost growth is established and an experimental set with a liquid nitrogen cooled tube is built up.
你可以得到这个量，同时还有一台足够灵敏的探测器,这台探测器能够探测出RDX分子,室温下在蒸汽里面的。
You've gotta have, and the machine which basically is sensitive enough to detect molecules of RDX that are in vapor at room temperature.
冰和蒸汽的分子除它们以不同的速度运动之外是完全相同的。
The molecules of ice and steam are exactly the same except that they are moving at different speeds.
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