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lack
luster
lackluster
adj
例
His lackluster gaze betrayed his exhaustion and lack of enthusiasm.
The artist's work felt lackluster compared to his previous vibrant pieces.
Despite her efforts, the shampoo couldn’t revive her lackluster locks.
The model's eyes appeared lackluster in the dim light, lacking their typical sparkle.
Her hair looked lackluster after several days without washing, losing its usual shine.
