词汇	掌握确证
释义	掌握确证 hold definite proofs确证
随便看	urban community education urban community health service urban community management Urban community management actors Urban community management system Urban community organization urban community safety urban community service urban community sport urban community sports urban community transport urban communlty urban commuter urban compact urban compatitiveness urban competence Urban competency Urban competency goal urban competition urban competition niche urban competitive capacity urbancompetitiveness urban competitiveness urban competitive power urban competltivenexs