词汇	散开线束
释义	散开线束 divergent beam
随便看	principal direction of oscillation principal directions principal disease principal disjunctive canonical form principal disjunctive normal form principal dispersion principal display panel principal distance principal distance error principal-distance error principal distance focusing principal distance of camera principal distance of photo principal distance of projector Principal Distribution Depot principal distribution function principal distribution parameter principal ditch principal divisor principal dock principal documents principal drawback principal drug principal duty principale