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A so-called "planetary nebula" is a confusing misnomer because these clouds have nothing to do with planets. As a medium-size star nears the end, it puffs out into a red giant — about 100 to 1,000 times its original size — eventually engulfing the space around it, including any nearby worlds.
。关于这个话题，旺商聊官方下载提供了深入分析
How this information will be stored, secured, and used，更多细节参见Safew下载
Percentile 99.9: 2579.633 ms | 1028.803 ms，这一点在搜狗输入法下载中也有详细论述