好词典

maser

UK //ˈmeɪzə//US //ˈmeɪzər//

词源

缩略自 Microwave Amplification by Stimulated Emission of Radiation(受激辐射微波放大),仿照laser(激光)构词法创造。

noun

❶ 微波激射器,一种产生和放大微波的装置,工作原理类似于激光,但产生的是微波而非可见光。

“The maser was used to amplify weak radio signals from space.”

(微波激射器被用来放大来自太空的微弱无线电信号。)

“Scientists developed the maser before the invention of the laser.”

(科学家们在激光发明之前就研发出了微波激射器。)

同义词:microwave amplifier, microwave laser

常见短语

hydrogen maser — 氢微波激射器,利用氢原子能级跃迁产生极其稳定的微波信号,主要用于高精度原子钟。

“The hydrogen maser clock loses less than one second every million years.”

(氢微波激射器时钟每百万年误差不到一秒。)