物理学家在30年前就提出了激光制冷的想法，但相关试验基本上都未获成功，而只用低压气体进行了试验。

Physicists proposed the idea of laser cooling 30 years ago, but until now, experiments had been largely unsuccessful and only worked with low-pressure gases.

youdao

物理学家在30年前就提出了激光制冷的想法，但相关试验基本上都未获成功，而只用低压气体进行了试验。

Physicists proposed the idea of laser cooling 30 years ago, but until now, experiments had been largely unsuccessful and only worked with low-pressure gases.

youdao