Physicists studying the issue talk not about time machines but about closed timelike curves (CTCs).
类想法的物理学家，谈的不是时光机器，而是类时迴圈（closedtimelikecurve,CTC）。
Physicists studying the issue talk not about time machines but about closed timelike curves (CTCs).
类想法的物理学家，谈的不是时光机器，而是类时迴圈（closedtimelikecurve,CTC）。
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