A sound wave radiates from a source in all directions.

声波从声源向四面八方辐射。

The propagation equation of sound wave in gas liquid mixtures is given.

文章给出声波在气液混合物中的传播方程。

The voltage in the signal varies in direct proportion to the sound wave.

信号中的电压按声波比例变化。

Vibrating objects produce sound waves, each vibration producing one sound wave.

振荡着的物体产生声波，每一次振荡产生一个声波。

Analog signals vary continuously; an example of an analog signal is a sound wave.

模拟信号是连续变化的；声波就是模拟信号的一个例子。