词汇	echo pulse
释义	echo pulse n.回波脉冲
随便看	periodic tracking signals periodic trade periodic traffic periodic train diagram periodic training periodic trajectory Periodic transaction periodic transfer function periodictransformation periodic transformation Periodic transmitted energy periodic traveling wave solution periodic travelling wave solution periodic treatment periodic trial balance periodic tridiagonal matrices periodic tridiagonal matrix periodic trigonometric function periodic twinning periodicty of function periodic type antenna periodic typewriter periodic undulation periodic undulations periodic unit amounts