名词
中文翻译：环形交易
同义词：
['circular trading', 'round-the-clock trading']
例句：
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1. In the old days, people used to trade in rings for money.
在旧时代，人们用戒指换钱。
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2. The company's policy of ring trading has been criticized by many investors.
该公司的环形交易政策受到了许多投资者的批评。
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3. The ring trading system is a way to ensure fairness and transparency in the market.
环形交易系统是一种确保市场公平性和透明度的方式。