名词
中文翻译：圆环
同义词：
['circus', 'arena', "ring例句：1. The hippodrome is the centerpiece of the ancient city's amphitheater.（圆环是古城市大剧场的中心。）"]
例句：
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1. The hippodrome is the centerpiece of the ancient city's amphitheater.
圆环是古城市大剧场的中心。
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2.The performers took to the stage in a circle, performing acrobatics and singing for the crowd.
表演者在一个圆圈中表演杂技和为观众唱歌。
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3. The hippodrome was a popular venue for public events and celebrations.
圆环是公共事件和庆祝活动的热门场所。