名词
中文翻译：自由传播的波
同义词：
['free wave', 'propagating wave例句：1. The free traveling wave is spreading throughout the city.（自由传播的波正在整个城市中传播。）']
例句：
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1. The free traveling wave is spreading throughout the city.
自由传播的波正在整个城市中传播。
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2.The scientists were able to observe the free traveling wave in the ocean.
科学家们能够观察到海洋中的自由传播的波。
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3. The free traveling wave was responsible for the sudden drop in temperature.
自由传播的波导致了温度的突然下降。