high frequency impulse

• 高频脉冲

high frequency impulse的用法和样例：

例句

1. They emit high frequency pulses of sound through their mouth or nose which bounce off surfaces and objects around them.
   它们通过嘴或鼻子发出高频脉冲声，这些脉冲声碰到周围的表面或物体就会反射回来。