铁路的红信号灯亮了，所以火车停下了。
他们在8个的大型椭圆星系中发现了红矮星发出的微弱信号，这些星系离我们相对较近——它们的距离都在5千万到3亿光年之间。
They found faint signatures of these red dwarf stars in eight massive elliptical galaxies relatively close to us—between 50 million and 300 million light-years away.
信号灯由红转绿，她继续开车，拼命不去臆测强纳斯的死：克里斯-克劳夫特船在波涛汹涌的灰暗大西洋上左右摇摆。
The stoplight had changed to green. She drove on, trying desperately to keep her mind from speculating about his death: The Chris-Craft rocking unsteadily in the turbulent grayAtlantic .
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