moving back and forth

back and forth withone back and forth 歌词 back and forth go back and forth moving back and forth only a yard of two from the toy 翻译 Back and forth they argued (back and forth)这个英文是什么意思? back -and- forth demodulator何意 The road moves back and forth and around corners是什么意思? backward and forward和back and forth的区别 英语翻译Rather than going back and forth between determination ( If you love walk back and forth这句是什么意思?