Signs directed traffic to a detour.
路标来往车辆行的路。
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By precisely timing the signals from these pulsars, teams in Europe, North America and Australia seek to detect long-wavelength ripples produced by pairs of supermassive black holes as they orbit each other at the centres of distant galaxies.
通过精确计时来自这些脉冲的信号, 欧洲、北美和澳大利亚的团队试图探测由成对的超大质量黑洞在遥远中心相互绕行时产生的长波波纹。