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。
When more than a set time frame, then failed to show that qualified products with led indicator display.
当超越了设定地时间规模，则停止不及格显现，产物及格用LED指示灯显现。
When more than a set time frame, then failed to show that qualified products with led indicator display.
当超越了设定地时间规模，则停止不及格显现，产物及格用LED指示灯显现。
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