scan expansion lens

例句：

1. 1. The police scanned the area for any signs of danger.
   警方在该地区搜索任何危险的迹象。
2. 2. She scanned through the stack of papers to find the report she needed.
   她浏览了一堆文件，找到了她需要的那份报告。
3. 3. The scientist scanned the data with a microscope to identify the patterns.
   科学家用显微镜扫描数据以识别模式。