名词
中文翻译：环
同义词：
['circle', 'loop', 'band', 'rope例句：1. The dog is playing with a ball in the park.（狗在公园里和球玩耍。）']
例句：
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1. The dog is playing with a ball in the park.
狗在公园里和球玩耍。
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2. The train has a loop on the track.
火车在轨道上有一段环线。
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3. The rope was wrapped around the tree to hold it up.
绳子绕在树上以支撑它。