lustreless
adj. 无光泽的；平淡乏味的
例句
The early autumn was lustreless and slack.
初秋的日子是黯淡、萧条的。
The day was cool and rather lustreless; the first note of autumn had been struck.
这天天气阴凉，光线暗淡，秋色已开始来临。
Prince Bagration turned to the officer of the suite and stared at him with his lustreless eyes in silence.
巴格拉季翁公爵把脸转向侍从军官，用那无神的目光默默地朝他瞥了一眼。
