以下为句子列表：
英文: Remaining at the center of the Vela Supernova Remnant is a pulsar, a star as dense as nuclear matter that completely rotates more than ten times in a single second.
中文: 船帆座超新星爆炸遗骸的中心还存在著一颗脉冲星，它是一颗如原子般致密的天体，一秒钟可以自转十次以上。
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英文: When the Hubble Space Telescope was pointed at the supernova remnant in 1994, however, the existence of curious rings was confirmed.
中文: 1994年，哈伯太空望远镜为这个超新星遗骸拍摄了一系列照片，确认了这些奇特环状结构的存在。
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