/biːm/
名词
光线;光束;光柱
The rabbit stopped, mesmerized by the beam of the car's headlights.
兔子被汽车前灯射出的光束迷住了眼,停了下来。
(尤指支撑建筑物或其他结构的)梁,桁架,栋梁
想跟读,去练习