iaser

例句：

1. 1.The scientist used a laser to cut the metal.
   科学家用激光切割金属。
2. 2. The laser beam was directed towards the target.
   激光束被指向目标。
3. 3. Lasers are commonly used for cutting, welding, and marking.
   激光通常用于切割、焊接和标记。