Cfel
abbr. Cerenkov free electron laser 切伦科夫自由电子激光器
🗣️ 情景例句
It took years of hard work.
那需要多年辛苦工作。
What is the coldest region in this country?
这个国家最冷的地带是哪里？
When can you come around to discuss some details with us?
什么时候可以过来和我们讨论细节呢？