In a thunderstorm you see the lightning first and then hear the thunder. This is because light travels very much faster than sound.
打雷时你先看到闪电，然后再听到雷声，这是因为光传播速度要比声音快。
Light travels faster than sound. This is why some people appear bright until you hear them speak.
光跑得比声音快，这就是为什么有些人看起来灵光，直到他们开口说话。
That's where I learned that light travels faster than sound, which is almost as slow as a flying rock.
我就是从那里了解了光比声音传播速度快的，因为声音总是和飞石差不多一样的速度。
That's where I learned that light travels faster than sound, which is almost as slow as a flying rock.
我就是从那里了解了光比声音传播速度快的，因为声音总是和飞石差不多一样的速度。
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