混合机放电离地面有足够的高度便于添加冷却混合机。
The mixer discharge is placed with sufficient height from the floor so that a cooling mixer can be added.
热大气层，热电离层：大气层介于中间层和外层空间之间的最外一层，在这一层中温度随高度而稳定增加。
The outermost shell of the atmosphere, between the mesosphere and outer space, where temperatures increase steadily with altitude.
离子密度随高度的解析展开是电离层物理模式参数研究中的一个关键技术。
The altitude semi-analytic expansion of ion densities is a key problem in parameterization of physical ionospheric models.
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