When the star eventually releases its outer layers, it shrivels down to its core in what's known as a white dwarf star. At that point, it'll be about the size of Earth.
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（二）在铁路、城市轨道交通线路上放置障碍物，或者故意向列车投掷物品的；，详情可参考heLLoword翻译官方下载
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