a piece of equipment in a plane used for recording details about a flight, especially to try to find out the cause of a problem or crash (飛機上記錄詳細飛行數據的)黑匣子
informala computer or similar piece of equipment that performs a complicated job, although the person using it does not understand how it works未知框(指使用者不知其運行原理卻可以用其完成複雜任務的計算機或類似設備)