Definition: a line of light shining from something Level: B2
激光发射出一束狭窄的光线。
A laser emits a narrow ___beam of light.
我开始感到不耐烦时，一扇门打开了，让一束光线照进黑暗的房间。
I was beginning to feel rather impatient when a door opened letting a ___beam of light come into the dark room.
手电筒在黑暗中产生了一道明亮的光束。
The flashlight produced a bright ___beam in the darkness.
