light travels faster than sound
光比声音传播得快
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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。
youdao
Light travels faster than sound.
光比声音传播得快。
The teacher said that light travels faster than sound.
老师说光比声音传播速度快。
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