beam/ biːm /

1.noun [of wood] [ metal] 


2.noun [of light] 


3.noun [Broadcasting] [ 物] 
射线

4.vi.
(smile) 喜形于色

5.vi.
(shine) 发光

6.vt.[+signals] [ pictures] 
(send) 播送

to drive on full {or} main {or} > high beam
 [US] 驾车时,前大灯都开着