Cfel
abbr. Cerenkov free electron laser 切倫科夫自由電子激光器
??? 情景例句
Tell me.
告訴我吧。
And she?
她呢？
Go down this street until you reach the second traffic lights. Turn right.
順這條街往前走，直到第2個紅綠燈處。往右拐。