| 例句 |
Sound travels four times faster in water than in air.声音在水中的传播速度是在空气中的四倍。Light travels at the highest achievable velocity in the universe.光的传播速度是宇宙中物体所能达到的最高速度。It's important to realize how quickly this disease can spread.知道这种疾病的传播速度有多快是很重要的。Nothing can travel faster than the speed of light.任何东西的传播速度都不会超过光速。 |