光束: light beam a surname密度: density; thickness双光束密度计: double beam densitometer; double-beam densitometer; double-beam-densitometer; double-beamde itometer束密度: beam density磁束密度: flux density档紧束密度: packing density file; packing factoi电子束密度: electron beam density紧束密度: packing density file射束密度: beam density文件紧束密度: packing density file表观齿磁束密度: apparent tooth density视在齿密度 表观齿磁束密度: apparenttoothdensity电子枪电子束密度倍增率: electron-gun density multiplication密度调制光束: density-modulated beam双光束光密度计: double-beam densitometer双光束分光光密度计: double-beam ectrode itometer; double-beam spectrodensitometer光束: light beam; light pencil; luminous flux; pencil; stricture密度: 1.(密集的程度) density; thickness 火力密度 density of fire; 兵力密度 density of troops; 那个国家的人口密度为每平方英里685人。 the population density of that country is 685 per square mile.2.[物理学] (物体的质量和其体积的比值) density 电流密度 current density; 海水密度 seawater density; 水银的密度比水大得多。 mercury has a much greater density than water.; 密度计 densimeter; densitometer; density gage; density indicator; gravitometer 暗光束: dark beam单光束: single beam导光束: endoscopic light guide bundles; light transmitting bundle低光束: low beam分光束: divided beams复光束: multiple-beam高光束: high beam