短語詞組短語back k down 放棄;讓步Back In Down Under 廻到下Back hawk down 黑鷹墜落let her back hair down 不拘禮節(jié)let our back hair down 不拘禮節(jié)let his back hair down 不拘禮節(jié)let their back hair down 不拘禮節(jié)let my back hair down 不拘禮節(jié)take one 's back hair down 把頭發(fā)散開放下來;坦率直言;無拘無束;態(tài)度隨便 返回 back down