老师说光比声音传播速度快。
因为她是第一个飞行速度比声音传播速度还快的女性飞行员。
She was the first woman to pilot a jet airplane faster than the speed of sound.
温度的升高或降低对声音传播速度的变化并不产生明显的影响。
The speed of sound increases slightly with a rise in temperature and falls with a decrease in temperature .
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