英['leɪzə(r)]美['leɪzər]
记忆方法
词源记忆法
首字母缩写词，来自light amplification by stimulated emission of radiation.
noun(名词)
双解例句
noun(名词)
小知识
A laser is a focused beam of light used for many reasons, from eye surgery to gun scopes to laser pointers.
The first laser was created more than 50 years ago. The word laser actually stands for “light amplification by stimulated emission of radiation,” and the result is a powerful beam of light that happens to be very useful. Many people know lasers from science fiction movies, where aliens fire deadly lasers at Earth. Lasers aren't that dramatic in real life, but they are used in many ways, including surgery and light shows.