And if we were --  If an astronaut went up to the Moon, a quarter of a million miles away, and lit a candle -- a single candle -- then we would be able to detect it, using the GMT.
如果…如果…如果我们…  如果一个宇航员去到月球， 离这里25万英里开外， 然后点起一根蜡烛，就单独一根蜡烛， 我们用GMT也能够发现它。