Cfel
abbr. Cerenkov free electron laser 切伦科夫自由电子激光器
🗣️ 情景例句
It was an extremely difficult and dangerous task.
这是一项极度困难的危险的工作。
Health and understanding are the two great blessing of life.
健康和融洽是人生两大幸事。
No, I'm afraid I'm not.
不，恐怕我来不了了。