水晶一种具有晶体结构的矿石，尤指石英的一种透明形态，通常其晶面在同一平面上 A mineral, especially a transparent form of quartz, having a crystalline structure, often characterized by external planar faces.
外形的，形式的关于或涉及事物外在形式或结构的 Relating to or involving outward form or structure.
基础材料用于支撑结构的材料或砖石建筑，例如墙 Material or masonry used to support a structure, such as a wall.
该结构的两部分未配合好。 The two halves of the structure didn't marry up.
