Beamysn.长尾巨鼠属beamvi.微笑；发光vt.播送；发射；用梁支撑n.桁条；光线；(光线的)束；(横)梁beam candiepower[电] 束烛光beam and rafters栋梁beam ray tracing光束追踪beam solid angle波束立体角beam orientation射野方向beam combination组束beam spot center光斑中心beam bifurcation光束分叉beam convergence束会聚,聚束,射束会聚beam irradiation波束辐射