n.激光；镭射

Lasers can be used to perform operations nowadays. 现在激光可以用来做手术。

He monopolizes the laser printer. 他独占了这台激光打印机。

The doctor finished the operation, but his success depended on the backroom boys who had invented the new laser scalpel. 医生做完了手术，但他的成功有赖于那些发明了新型激光手术刀的研究人员。