beam
noun [ C ] uk/biːm/ us/biːm/
(LINE)
B2 光线;光束;光柱
a line of light that shines from a bright object
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: moonbeamsunbeam
（定向发出的）射束，粒子流
a line of radiation or particles flowing in one direction
a laser beam 激光束
an electron beam 电子波
(WOOD)
（尤指支撑建筑物或其他结构的）梁，桁架，栋梁
a long, thick piece of wood, metal, or concrete, especially used to support weight in a building or other structure
The sitting room had exposed wooden beams. 客厅顶上有裸露的木梁。
the beam （女子体操运动中的）平衡木
in the sport of women's gymnastics, a wooden bar on which the competitors balance and perform movements
beam
verb uk/biːm/ us/biːm/
(SMILE)
[ I ]高兴的微笑，眉开眼笑
to smile with obvious pleasure
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。
(SEND OUT)
[ I or T ]辐射;发光;闪光;发射电波;播送
to send out a beam of light, an electrical or radio signal, etc.
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。