Because calculations and lab experiments replicating the Venusian surface and atmosphere show that emissivity decreases over time, emissivity can be an important indicator of a substance's age.
同时因为计算与实验室的实验复制的金星地表与大气层的活动，表明辐射率一直在下降，所以辐射率能够成为某个地质年代的一个重要指标。
It was only possible to detect the length of the Venusian day by radar as the clouds entirely engulf the surface.
这是只可能检测为云雷达对金星一天的长度完全吞噬的表面。
It was only possible to detect the length of the Venusian day by radar as the clouds entirely engulf the surface.
这是只可能检测为云雷达对金星一天的长度完全吞噬的表面。
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