英语固定的搭配是否都不能换位 如:achs and pains,back and forth 前

英语固定的搭配是否都不能换位 如:achs and pains,back and forth 前 back and forth withone back and forth 歌词 back and forth go back and forth Back and forth they argued backward and forward和back and forth的区别 以“the train shakes back and forth…”开头的英语完型填空, (back and forth)这个英文是什么意思? back -and- forth demodulator何意 round and round neck and neck back and 三个都是短语吗?是固定搭配? The road moves back and forth and around corners是什么意思?