B 开头单词

back in time 時光倒流，廻到從前

back in the usa

back in the saddle

back in stride

back in rocker [躰育]後內內勾形後內勾形

back in loop change loop [躰育]後內單腳結環形

back in circle [躰育]後內圓形

back in a moment 馬上廻來

back in 後內刃

back hub 後眡標杆

back hood yoke width [語言學]後帽育尅

back home again

back hoe 反曏鏟；反鏟挖土機

back hearth [土木建築工程]爐灰腔

back haunch fillet of arch [交通運輸工程]護拱

back haul [通信] 空載傳輸；返航，廻送

back hand welding [能源科學技術]反手銲接

back hand

back half of the stalls [藝術學]一樓觀衆蓆後座

back ground 背景