MadeyˈmeɪdiCOCA²⁵⁴³³⁷⁺⁶BNC¹⁴⁴⁶⁶⁴⁺³ 基本例句 马代¹⁰⁰ The system will be based on the free-electron laser, invented in the 1970s by John Madey, which generates light from a powerful beam of electrons. 该激光系统设计的原理是基于上世纪70年代 John Madey发明的自由电子激光器原理。 这种激光器依靠大功率的电子束发光。 yeeyan