Mister Kao discovered how to transmit,or send,light signals over long distances through optical glass fibers.

VOA: special.2009.12.08

It's all very mysterious and we send off a spaceship to investigate the markings, the radio signals from the other place.

一切都很神秘,所以我们,派遣一艘飞船去调查星球上的印记,以及那些从其他星球传来的无线电信号

耶鲁公开课 - 死亡课程节选

It's all very mysterious and we send off a spaceship to investigate the markings, the radio signals from the other place.

一切都很神秘,所以我们,派遣一艘飞船去调查星球上的印记,以及那些从其他星球传来的无线电信号

耶鲁公开课 - 死亡课程节选