s. lacking brilliance or vitality
s. lacking luster or shine
a. 没有光泽的, 无生气的, 平凡的
n. 无光泽, 无生气, 暗淡
1. The movie received lackluster reviews from critics.
这部电影得到了评论家平淡无奇的评价。
2. Her performance was lackluster, and she did not impress the audience.
她的表演很乏味，没有给观众留下深刻印象。
3. Sales were lackluster this quarter, so the company needs a new strategy.
这个季度的销售情况平平，因此公司需要一个新策略。