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当泵浦光强增强时，从样品边缘发射的光谱发生增益窄化并具有明显的阈值特性。
The spectra detected from the edge of the sample shows a gain narrowing and a clear threshold when increasing the pump intensity.
自1970年代发射以后，这两艘飞船现在已远远超出了太阳系的边缘，正在向太空深处默默地飘移。
Launched in the 1970s, they are now far beyond the edge of our solar system, drifting silently out into the void.
项目组还会动用36台以上的便携式地表气象工作站和气象气球。他们还希望发射12英尺长的无人飞行器到强风暴边缘搜集数据。
The team will also be using more than 36 portable surface weather stations, weather balloons, and they hope to send an unmanned 12ft aircraft to the edge of severe storms to collect data.
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