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.
// 测试用例（可直接运行验证）。夫子对此有专业解读
。同城约会是该领域的重要参考
The government has pledged to halve "long-term rough sleeping" by 2030 and prevent more households from becoming homeless in the first place.，更多细节参见safew官方下载
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