laser reflection characteristics of targets

例句：

1. 1.The laser is used to cut through metal.
   激光被用来切割金属。
2. 2. Thelaser printer can print high-quality documents quickly.
   激光打印机可以快速打印高质量的文件。
3. 3. The laserbeam was directed at the target.
   激光束被对准了目标。