skeleton sketch

例句：

1. 1.The artist used a skeleton sketch to guide his final design.
   这位艺术家用骨架草图来指导他的最终设计。
2. 2.The scientist conducted a skeleton sketch of the new model.
   这位科学家对新模型进行了骨架草图的绘制。
3. 3.The architect drew a skeleton sketch before starting the construction.
   建筑师在开始建造之前绘制了骨架草图。