| 单词 | laser |
| 释义 | laser (once / 3834 pages) n 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, light shows, and actual weapons. WORD FAMILYlaser: lasers USAGE EXAMPLESEach unit’s record platter is checked by lasers and human workers to ensure perfect balance. New York Times(Jan 01, 2017) Shining a laser pointer at an occupied air craft is now a misdemeanor offense. Washington Times(Jan 01, 2017) “There's not a lot of spaces being built like this anymore,” said Tony Castillo, 36, who creates laser cutting art and is a tenant. Los Angeles Times(Dec 30, 2016) n an acronym for light amplification by stimulated emission of radiation; an optical device that produces an intense monochromatic beam of coherent light Syn|Hyper optical maser optical device a device for producing or controlling light |
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