graphics light pen

例句：

1. 1. Thearchitect drew a detailed blueprint of thenew building.
   建筑师绘制了新建筑的详细蓝图。
2. 2. The teacher used charts to explainthe scientific principles.
   老师使用图表来解释科学原理。
3. 3. The engineer drew several graphs toillustrate the data.
   工程师绘制了几个图表来说明数据。