Physicists studying the issue talk not about time machines but about closed timelike curves (CTCs).
讨论这
想法的物理学家，谈的不是时光机器，而是时
（closedtimelikecurve,CTC）。
时Physicists studying the issue talk not about time machines but about closed timelike curves (CTCs).
讨论这想法的物理学家，谈的不是时光机器，而是时（closedtimelikecurve,CTC）。
明：以上
句、词性
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