sine wave

例句：

1. 1. The sinusoidal wave was caused by theirregular wind speed.
   不规则的风速引起了正弦波。
2. 2. The sinusoidalwave was used to measure the distance betweentwo points on a map.
   正弦波被用来测量地图上两点之间的距离。
3. 3. Thesinusoidal wave was used togenerate the audio signal for the speaker system.
   正弦波被用来生成扬声器系统的音频信号。