单词	周期性信号
释义	周期性信号periodic signal
随便看	letter to the world的意思 letter type code的意思 letter weight的意思 letterweight的意思 letter wood的意思 letter-wood的意思 letterwood的意思 letter worship的意思 letter writer的意思 letter-writer的意思 letterwriter的意思 letter writers的意思 letter. written the wrong的意思 letterzine的意思 letter–perfect的意思 letter (或 warrant) of attorney的意思 let that alone的意思 let that alone,的意思 let that fly stick in the wall的意思 let that fly stick in (to) the wall的意思 let that fly stick in to the wall的意思 let that pass的意思 let the air out的意思 let the air out,的意思 let the cat out的意思