To indiscriminately mix good and bad elements; to fail to distinguish between the valuable and the worthless.
在这个项目中，团队成员水平参差不齐，真是瓦玉集糅，给整体进展带来了一些挑战。
In this project, the team members' skill levels vary greatly, truly a mixture of good and bad, which brought some challenges to the overall progress.
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