microdrawing

例句：

1. 1. This is a microdrawing of the city's skyline.
   这是城市天际线的微型绘图。
2. 2. Microdrawings are often used in scientific illustrations.
   微型绘图常用于科学插图中。
3. 3. The artist created a series of microdrawings to illustrate the process.
   艺术家创作了一系列微型绘图来说明这个过程。