名词
中文翻译：联合环
同义词：
['ring of union', 'union circle例句：1. The union ring is a symbol of unity among the workers.（联合环是工人团结的象征。）']
例句：
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1. The union ring is a symbol of unity among the workers.
联合环是工人团结的象征。
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2. The union ring was formed to protect the rights of workers.
联合环是为了保护工人权利而成立的。
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3.The union ring has been a powerful tool for organizing and advocating for workers' rights.
联合环一直是组织和倡导工人权利的强大工具。