the shiny quality of a surface that reflects light光泽
the luster of polished metal
打磨过的金属的光泽
He polished the silverware for hours trying to restore its luster.
他花了几小时擦拭银器，试图使其恢复光泽。
the luster of her eyes
她双眸的光彩
: an appealing, exciting, or admired quality光辉；光彩
The trip loses some of its luster [=it becomes less appealing or exciting] after you’ve done it several times.
这段旅途走过多次后，就失去了原有的一些光彩。
The scandals have tarnished/dimmed his luster. [=damaged his reputation]
丑闻损害了他的名誉。
the luster [=renown] of the family’s name
家族名声的荣耀