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，详情可参考WPS官方版本下载
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.。快连下载安装对此有专业解读
52. 鼓励学生深造日本拟设大学本硕“五年一贯制” - 新华网, www.news.cn/world/20251…