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TOEFL IELTS BNC: 3945 COCA: 3741

beam noun [ C ] LINE

B2 a line of light that shines from a bright object光线;光束;光柱

We could just pick out the trail in the weak beam of the flashlight.我们借着手电筒微弱的光仅能勉强认清路。
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。
See also

a line of radiation or particles flowing in one direction(定向发出的)射束,粒子流

a laser beam激光束
an electron beam电子波

beam noun [ C ] WOOD

a long, thick piece of wood, metal, or concrete, especially used to support weight in a building or other structure(尤指支撑建筑物或其他结构的)梁,桁架,栋梁

The sitting room had exposed wooden beams.客厅顶上有裸露的木梁。
the beam

in the sport of women's gymnastics, a wooden bar on which the competitors balance and perform movements(女子体操运动中的)平衡木

beam verb SMILE

[ I ] to smile with obvious pleasure高兴的微笑,眉开眼笑

She beamed with delight/pleasure at his remarks.听完他的话她高兴得眉开眼笑。
The child beamed at his teacher as he received the award.那个孩子在领奖时对他的老师报以微笑。
[ + speech ] "I'm so pleased to see you," he beamed (= said as he smiled).“见到你很高兴,”他微笑着说。

beam verb SEND OUT

[ I or T ] to send out a beam of light, an electrical or radio signal, etc.辐射;发光;闪光;发射电波;播送

The sun beamed (= shone brightly) down on the boat as it drifted along.阳光照在缓缓漂动的船上。
The concert was beamed (= broadcast) by satellite all over the world.音乐会经卫星播送到世界各地。

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