当太阳活动剧烈时，太阳极端的紫外线会加热并使热大气层扩张。
When solar activity is high, solar extreme ultraviolet rays warm and expand the thermosphere.
最后，实验采用加长器件阳极端部管长的方式减少沾污，并得到了实际应用。
At last, the window pollution is reduced by means of prolonging the tube nearby the anode side, and the improving has been used in practice.
最后，实验采用加长器件阳极端部管长的方式减少沾污，并得到了实际应用。
At last, the window pollution is reduced by means of prolonging the tube nearby the anode side, and the improving has been used in practice.
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