n.激光；镭射
Lasers can be used to perform operation的复数形式" target="_blank">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。
