In the past people didn't know that light travels faster than sound.
过去人们不知道光比声音传播得快。
光的传播速度比声音快。
Light travels faster than sound.
光比声音传播得快。
Light travels faster than sound.
光比声传播速度快。
Light travels faster than sound.
光速比声速快。
Light travels faster than sound.
光的行进速度比声音快。
Light travels are faster than sound.
光速比声速快。
Light travels much faster than sound.
光速比声速快得多。
比声音还快！
Some planes can fly even faster than sound.
有些飞机能够飞的比声音还快。
Will we be flying faster than sound in 2093?
2093年的飞机飞行速度可以超过光速么？
Are you sure that light is faster than sound?
你确定光速比声音还快吗？
Father said, "Light travels much faster than sound."
父亲说，“光比声音传播快得多。”
Father said that light travels much faster than sound.
父亲说光比声音传播快得多。
As is well known, light travels faster than sound.
众所周知，光比声音传播快。
He said that light travels much faster than sound.
他说光传播比声音传播快得多。
Father said, Light travels much faster than sound.
父亲说，光比声音传播快得多。
He said that light travels much faster than sound.
他说光比声音传播得快。
Light travels faster than sound, as is known to all.
光传播得比声音快，这一点大伙都知道。
The teacher said that light travels faster than sound.
老师说光比声音传播速度快。
We all know that light travels much faster than sound.
大家知道光比声音传播得快得多。
Our teacher told us that light travels faster than sound.
我们的老师告诉我们光比声音传播得快。
Our teacher told us light travels much faster than sound.
老师告诉我们光传播的速度比声音快得多。
The teacher told us that light travels faster than sound.
老师告诉我们光速比音速要快。
The teacher told us that light travels much faster than sound.
老师告诉我们光比声音传播快。
Our physics teacher told us that light travels faster than sound.
物理老师告诉我们光的速度比声的速度快。
Light travels faster than sound at the speed of 300,000 kilometres per second.
光速比声速要快，为每秒钟30万公里。
I had known that light travels faster than sound gradually when I was young.
当我小的时候我渐渐地知道光速比声速快。
Since light travels faster than sound, people appear bright until you hear them speak.
因为光比声音快，所以在人们没说话的时候，个个都看起来很聪明。
Since light travels faster than sound, people appear bright until you hear them speak.
因为光比声音快，所以在人们没说话的时候，个个都看起来很聪明。
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