Of, relating to,.or being a document retrieval system in which desired documents are identified by light shining through matching holes in index cards.
文件检索系统的(以光照射过指引卡的孔来检索文件的方法的)。
Game for amusing a small child, in which one repeatedly hides his face or body and pops back into view exclaiming " peek-aboo."
躲躲猫(面孔一隐一现或藏身后突然出现喊peek-aboo以逗小孩的游戏)。