中文字幕日韩一区二区三区本高|日本五十路六十路亲子交尾|软件草莓丝瓜秋免费安卓|小奶球抖动舞蹈视频|午夜院影免费|魂离之手到擒来|精品精品国产自在久久

The laser is called "the fastest knife", "the most accurate ruler", and "the brightest light".

In fact, the original Chinese name of laser is "Laser" and "Lace". It is a homophone of the English name LASER. The full name of the word LASER is Light Amplification by Stimulated Emission of Radiation, LASER, because foreign scientists feel that the English name is too long. , Then took the first letter of the main word in the full name and simplified it to "LASER".

 L= Light

 A= Amplified (amplified)

 S= Stimulated (stimulated)

 E= Emission

 R= Radiation (radiation, emission)

English Light Amplification by Stimulated Emission of Radiation translated into Chinese means "light amplification by stimulated emission radiation."

At the beginning, Chinese scientific and technical personnel translated it as "optical stimulated emission" based on the full English name of laser. The famous Chinese scientist Qian Xuesen felt that the translation was too long and suggested changing the name to "laser".