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A half dozen or so have been reported over the last millennium, but there should be 20 or 30.
在过去的一千年里，本应该出现20到30个的超新星，报导出来的有六个左右。
The mood of society in the final decade of the last millennium was more defining than what was actually worn.
在过去千年的最后十年里，社会的情绪比实际磨损的更为确定。
PERHAPS the biggest big idea to gather speed during the last millennium was that we humans might govern ourselves.
也许在上一千年，逐渐加速的一个最大的大胆想法是，我们人类能够管理自己。
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