arenas

英 [əˈriːnəz]

美 [əˈrinəz]

n. 圆形运动场; 圆形剧场; 斗争场所; 竞争舞台; 活动场所
arena的复数

柯林斯词典

N-COUNT 运动场；竞技场；体育场
Anarenais a place where sports, entertainments, and other public events take place. It has seats around it where people sit and watch.
1. ...the largest indoor sports arena in the world.
  世界上最大的室内体育场
N-COUNT 活动领域;舞台
You can refer to a field of activity, especially one where there is a lot of conflict or action, as anarenaof a particular kind.
1. He made it clear he had no intention of withdrawing from the political arena...
  他清楚地表明他无意退出政治舞台。
2. Oil speculation proved a natural arena for his skills.
  在石油业中进行投机活动对他来说游刃有余。