Lucq吕克luabbr.[化]镥（=lutetium）abbr.卢森堡（=luxembourg）luminance free signal去亮度信号Lujiahe shallow reach芦家河浅滩luminance attenuation亮度衰减luminance enhancement亮度增强Luzong volcanic basin庐枞火山盆地lumbago and back pain腰背疼痛Luciogobius elongatus梭长竿虾虎鱼Luo Cheng at the gate罗成叫关Luntai imperial order轮台诏lubrication intervals加润滑油间隔期