Cfel
abbr. Cerenkov free electron laser 切伦科夫自由电子激光器
🗣️ 情景例句
He's a pretty good bloke and he seems very friendly.
他是一个很不错的家伙，看起来也很友善。
It's urgent to improve the packing.
必须马上改进包装。
The train arrived on time.
火车准时到达。