Cfel
abbr. Cerenkov free electron laser 切伦科夫自由电子激光器
🗣️ 情景例句
I have two days off a week.
我一星期休息两天。
She never mends her clothes; they all have holes in them.
她从来都不补缀衣服。因此，衣服上到处都是破洞。
She feared staying alone in the farmhouse.
她害怕一个人留在农舍里。