短语词组短语pillar -box red 鲜红的letterbox mailbox pillar -box 邮局设置的供人投寄信件的箱子drop into a pillar -box 投寄信件post -box pillar-box 设在路旁供寄信用的柱墩状箱Pillar Box Red 邮筒红pillar box door structure 柱箱门结构pillar box mailbox 邮筒 返回 pillar box