n.

a signal transmitted along a narrow path; guides pilots in darkness or bad weather

同義詞：radio beam

long thick piece of wood or metal or concrete, etc., used in construction

a column of light (as from a beacon)

同義詞：beam of lightlight beamrayray of lightshaftshaft of lightirradiation

a group of nearly parallel lines of electromagnetic radiation

同義詞：rayelectron beam

(nautical) breadth amidships

a gymnastic apparatus used by women gymnasts

同義詞：balance beam

Laser Beams and Resonators
Diffraction-free beams.
Diffraction-free beams (A)
Exact solutions for nondiffracting beams. I. The scalar theory
Fast ignition by intense laser-accelerated proton beams.
Focusing of high numerical aperture cylindrical-vector beams
Production and characterization of supersonic carbon cluster beams
Frequency response of cantilever beams immersed in viscous fluids with applications to the atomic force microscope
Frequency response of cantilever beams immersed in viscous fluids near a solid surface with applications to the atomic force microsc...
Erratum: “Frequency response of cantilever beams immersed in viscous fluids near a solid surface with applications to the atomic fo...