[] a particular market or an area of business（某一）市场，商业领域◆The wholesale market is a highly competitive arena.批发市场是高度竞争的领域。an area of activity that concerns the public, especially one where there is a lot of opposition between different groups or countries对立场所；竞争舞台◆The company's problems are now in the public arena(= are known and discussed by people in general).公司的问题现已众所周知。